style: Add dark mode version for MVT logo (#2995)

Signed-off-by: Jonah Aragon <jonah@privacyguides.org>
Signed-off-by: fria <fria@privacyguides.org>

docs/device-integrity.md

@@ -69,7 +69,8 @@ These tools can trigger false-positives. If any of these tools finds indicators
 
 <div class="admonition recommendation" markdown>
 
-![MVT logo](assets/img/device-integrity/mvt.webp){ align=right }
+![MVT logo](assets/img/device-integrity/mvt.webp#only-light){ align=right }
+![MVT logo](assets/img/device-integrity/mvt-dark.png#only-dark){ align=right }
 
 **Mobile Verification Toolkit** (**MVT**) is a collection of utilities which simplifies and automates the process of scanning mobile devices for potential traces of targeting or infection by known spyware campaigns. MVT was developed by Amnesty International and released in 2021 in the context of the [Pegasus Project](https://forbiddenstories.org/about-the-pegasus-project).
 

docs/tools.md

@@ -723,7 +723,7 @@ These tools may provide utility for certain individuals. They provide functional
 
 <div class="grid cards" markdown>
 
-- ![MVT logo](assets/img/device-integrity/mvt.webp){ .twemoji loading=lazy } [Mobile Verification Toolkit](device-integrity.md#mobile-verification-toolkit)
+- ![MVT logo](assets/img/device-integrity/mvt.webp#only-light){ .twemoji loading=lazy }![MVT logo](assets/img/device-integrity/mvt-dark.png#only-dark){ .twemoji loading=lazy } [Mobile Verification Toolkit](device-integrity.md#mobile-verification-toolkit)
 - ![iMazing logo](assets/img/device-integrity/imazing.png){ .twemoji loading=lazy } [iMazing (iOS)](device-integrity.md#imazing-ios)
 - ![Auditor logo](assets/img/device-integrity/auditor.svg#only-light){ .twemoji loading=lazy }![Auditor logo](assets/img/device-integrity/auditor-dark.svg#only-dark){ .twemoji loading=lazy } [Auditor (Android)](device-integrity.md#auditor-android)