Switch images to svgs, where possible (#1563)

Closes #1361, #1362

_includes/sections/password-managers.html

@@ -7,7 +7,7 @@
 {%
   include cardv2.html
   title="Bitwarden - Cloud/Self-host"
-  image="/assets/img/tools/bitwarden.png"
+  image="/assets/img/svg/3rd-party/bitwarden.svg"
   description="<strong>Bitwarden</strong> is a free and open-source password manager. It aims to solve password management problems for individuals, teams, and business organizations. Bitwarden is among the easiest and safest solutions to store all of your logins and passwords while conveniently keeping them synced between all of your devices. If you don't want to use the Bitwarden cloud, you can easily host your own Bitwarden server."
   website="https://bitwarden.com/"
   forum="https://forum.privacytools.io/t/discussion-bitwarden/1343"
@@ -32,7 +32,7 @@
 {%
   include cardv2.html
   title="KeePassXC - Local"
-  image="/assets/img/tools/keepassxc.png"
+  image="/assets/img/svg/3rd-party/keepassxc.svg"
   description="<strong>KeePassXC</strong> is a community fork of KeePassX, a native cross-platform port of KeePass Password Safe, with the goal to extend and improve it with new features and bugfixes to provide a feature-rich, fully cross-platform and modern open-source password manager."
   website="https://keepassxc.org/"
   forum="https://forum.privacytools.io/t/discussion-keepassxc/1344/2"
@@ -52,7 +52,7 @@
 {%
   include cardv2.html
   title="LessPass - Browser"
-  image="/assets/img/tools/LessPass.png"
+  image="/assets/img/svg/3rd-party/lesspass.svg"
   description="<strong>LessPass</strong> is a free and open-source password manager that generates unique passwords for websites, email accounts, or anything else based on a master password and information you know. No sync needed. Uses PBKDF2 and SHA-256. It's advised to use the browser addons for more security."
   website="https://lesspass.com/"
   forum="https://forum.privacytools.io/t/discussion-keepassxc/1344/2"