chore: address review feedback on registry-guideline automation

.github/PULL_REQUEST_TEMPLATE.md

@@ -19,7 +19,7 @@ Fixed: #  (if any)
 - [ ] 📖 **Documentation** (`documentation`)
 - [ ] 🧰 **Maintenance** (`chore` or `refactor`)
 - [ ] 💥 **Breaking change** (`breaking`) — forces a minor bump and a
-  `## Breaking changes` section in the drafted release notes. Tick this
+  breaking-changes section in the drafted release notes. Tick this
   whenever you rename / remove public API, change field layouts, or
   otherwise require a downstream code change.
 

.github/workflows/AutoRegister.yml.disabled

@@ -63,8 +63,12 @@ jobs:
           # already carries its own header the nesting is cosmetic only.
           WRAPPED=$(printf '## Changelog\n\n%s\n\nSee the full changelog at <https://github.com/%s/releases/tag/v%s>.' \
             "$DRAFT_BODY" "${{ github.repository }}" "$CURR")
-
-          printf 'content<<RELEASE_NOTES_EOF\n%s\nRELEASE_NOTES_EOF\n' "$WRAPPED" >> "$GITHUB_OUTPUT"
+          delim="RELEASE_NOTES_$(openssl rand -hex 16)"
+          {
+            echo "content<<$delim"
+            printf '%s\n' "$WRAPPED"
+            echo "$delim"
+          } >> "$GITHUB_OUTPUT"
 
       - name: Post @JuliaRegistrator comment on commit
         if: steps.version_check.outputs.changed == 'true'

.github/workflows/PRLabeler.yml

@@ -49,4 +49,6 @@ jobs:
 
           if echo "$PR_BODY" | grep -qi "\- \[x\].*Breaking"; then
             gh pr edit "$PR_NUMBER" --repo "$REPO" --add-label "breaking"
+          else
+            gh pr edit "$PR_NUMBER" --repo "$REPO" --remove-label "breaking" 2>/dev/null || true
           fi