always use UTC as the time zone for build dates

static/releases.html

@@ -321,6 +321,7 @@
                 <li>use build-tools prebuilts to PATH in the release signing script to reduce external dependencies and avoid potential reproducibility issues</li>
                 <li>fix upstream bug relying on malloc addresses for sort order of 3 items, causing Bluetooth A2DP audio to fail 2/3 of the time with hardened_malloc when the expected item isn't first</li>
                 <li>keep build number and datetime consistent</li>
+                <li>always use UTC as the time zone for build dates</li>
             </ul>
 
             <p>Restoration of past features since the 2020.05.05.02 release:</p>