Update mkdocs-material

Signed-off-by: Daniel Gray <dngray@privacyguides.org>

docs/email.en.md

@@ -24,7 +24,7 @@ For everything else, we recommend a variety of email providers based on sustaina
 
     **Proton Mail** is an email service with a focus on privacy, encryption, security, and ease of use. They have been in operation since **2013**. Proton AG is based in Genève, Switzerland. Accounts start with 500 MB storage with their free plan.
 
-    Free accounts have some limitations, such as not being able to search body text and not having access to [Proton Mail Bridge](https://proton.me/mail/bridge), which is required to use a [recommended desktop email client](email-clients.md) (e.g. Thunderbird). Paid accounts include features like Proton Mail Bridge, additional storage, and custom domain support.
+    Free accounts have some limitations, such as not being able to search body text and not having access to [Proton Mail Bridge](https://proton.me/mail/bridge), which is required to use a [recommended desktop email client](email-clients.md) (e.g. Thunderbird). Paid accounts include features like Proton Mail Bridge, additional storage, and custom domain support. A [letter of attestation](https://proton.me/blog/security-audit-all-proton-apps) was provided for Proton Mail's apps on 9th November 2021 by [Securitum](https://research.securitum.com).
 
     If you have the Proton Unlimited, Business, or Visionary Plan, you also get [SimpleLogin](#simplelogin) Premium for free.
 

docs/os/qubes-overview.en.md

@@ -33,7 +33,7 @@ You can [copy and paste text](https://www.qubes-os.org/doc/how-to-copy-and-paste
 
 ### File Exchange
 
-To copy and paste files and directories (folders) from one VM to another, you can use the option **Copy to Other AppVM...** or **Move to Other AppVM...**. The difference is that the **Move** option will delete the original file. Either option will protect your clipboard from being leaked to any other Qubes. This is more security than air-gapped file transfer because an air-gapped computer will still be forced to parse partitions or file systems. That is not required with the inter-qube copy system.
+To copy and paste files and directories (folders) from one VM to another, you can use the option **Copy to Other AppVM...** or **Move to Other AppVM...**. The difference is that the **Move** option will delete the original file. Either option will protect your clipboard from being leaked to any other Qubes. This is more secure than air-gapped file transfer because an air-gapped computer will still be forced to parse partitions or file systems. That is not required with the inter-qube copy system.
 
 ??? info "AppVMs or qubes do not have their own file systems"
 

docs/vpn.en.md

@@ -58,7 +58,7 @@ Find a no-logging VPN operator who isn’t out to sell or read your web traffic.
 
 ??? check "Independently Audited"
 
-    As of January 2020, Proton VPN has undergone an independent audit by SEC Consult. SEC Consult found some medium and low risk vulnerabilities in Proton VPN's Windows, Android, and iOS applications, all of which were "properly fixed" by Proton VPN before the reports were published. None of the issues identified would have provided an attacker remote access to your device or traffic. You can view individual reports for each platform at [protonvpn.com](https://protonvpn.com/blog/open-source/). In April 2022 Proton VPN underwent [another audit](https://protonvpn.com/blog/no-logs-audit/) and the report was [produced by Securitum](https://protonvpn.com/blog/wp-content/uploads/2022/04/securitum-protonvpn-nologs-20220330.pdf).
+    As of January 2020, Proton VPN has undergone an independent audit by SEC Consult. SEC Consult found some medium and low risk vulnerabilities in Proton VPN's Windows, Android, and iOS applications, all of which were "properly fixed" by Proton VPN before the reports were published. None of the issues identified would have provided an attacker remote access to your device or traffic. You can view individual reports for each platform at [protonvpn.com](https://protonvpn.com/blog/open-source/). In April 2022 Proton VPN underwent [another audit](https://protonvpn.com/blog/no-logs-audit/) and the report was [produced by Securitum](https://protonvpn.com/blog/wp-content/uploads/2022/04/securitum-protonvpn-nologs-20220330.pdf). A [letter of attestation](https://proton.me/blog/security-audit-all-proton-apps) was provided for Proton VPN's apps on 9th November 2021 by [Securitum](https://research.securitum.com).
 
 ??? check "Open-Source Clients"