fix: add workflow_dispatch to post-release.yml

JoshuaKGoldberg · JoshuaKGoldberg · commit 7d3ddd815d6e · 2023-05-11T01:52:56.000-04:00
diff --git a/.github/workflows/post-release.yml b/.github/workflows/post-release.yml
@@ -14,3 +14,4 @@ name: Post Release
 on:
   release:
     types: [published]
+  workflow_dispatch: ~
