Bug 1825401 - Part 2. Bump OpenH264 version to 2.3.1. r=jmaher

This patch updates the revision to match that of the 2.3.1 release of
OpenH264.

Depends on D174009

Differential Revision: https://phabricator.services.mozilla.com/D174010

taskcluster/ci/openh264-plugin/kind.yml

@@ -20,7 +20,7 @@ job-defaults:
         tier: 2
     run-on-projects: []
     repo: 'https://github.com/cisco/openh264.git'
-    revision: '2e1774ab6dc6c43debb0b5b628bdf122a391d521'
+    revision: '0a48f4d2e9be2abb4fb01b4c3be83cf44ce91a6e'
     worker:
         chain-of-trust: true