Add release notes summarizing recent updates

bgandon · bgandon · commit d9352382ead9 · 2025-03-16T18:23:14.000+01:00
diff --git a/ci/release_notes.md b/ci/release_notes.md
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+### Improvements
+
+- Built resource image on top of Alpine 3.21.3
+- Added new Concourse tests on version families `3.3`, and `3.4`
