chg: bump comment action to latest release, verify checkout depth

* see: marocchino/sticky-pull-request-comment#298
  in upstream action repo

Signed-off-by: Stephen L Arnold <nerdboy@gentoo.org>

.github/workflows/coverage.yml

@@ -169,12 +169,13 @@ jobs:
         output: 'both'
 
     - name: Add Coverage PR Comment
-      uses: marocchino/sticky-pull-request-comment@v2.1.1
+      uses: marocchino/sticky-pull-request-comment@v2.2.0
       if: ${{ github.event_name == 'pull_request' }}
       with:
         header: coverage
-        recreate: true
         path: code-coverage-results.md
+        hide_and_recreate: true
+        hide_classify: "OUTDATED"
 
   test:
     name: Coverage check
@@ -258,12 +259,13 @@ jobs:
         fi
 
     - name: Comment PR with test coverage delta
-      uses: marocchino/sticky-pull-request-comment@v2.1.1
+      uses: marocchino/sticky-pull-request-comment@v2.2.0
       if: env.HAVE_BASE_COVERAGE == 'true'
       with:
         header: delta
-        recreate: true
         path: coverage-delta.md
+        hide_and_recreate: true
+        hide_classify: "OUTDATED"
 
   badge:
     # Only generate and publish if these conditions are met: