Pin SHA and replace comment.

Author: kinyoklion

.github/workflows/browser.yml

@@ -48,7 +48,7 @@ jobs:
 
       - name: Find Size Comment
         if: github.event_name == 'pull_request' && matrix.version == '21'
-        uses: peter-evans/find-comment@v3
+        uses: peter-evans/find-comment@3eae4d37986fb5a8592848f6a574fdf654e61f9e
         id: fc
         with:
           issue-number: ${{ github.event.number }}
@@ -57,7 +57,7 @@ jobs:
 
       - name: Create comment
         if: steps.fc.outputs.comment-id == '' && github.event_name == 'pull_request' && matrix.version == '21'
-        uses: peter-evans/create-or-update-comment@v4
+        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043
         with:
           issue-number: ${{ github.event.number }}
           body: |
@@ -67,9 +67,10 @@ jobs:
 
       - name: Update comment
         if: steps.fc.outputs.comment-id != '' && github.event_name == 'pull_request' && matrix.version == '21'
-        uses: peter-evans/create-or-update-comment@v4
+        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043
         with:
           comment-id: ${{ steps.fc.outputs.comment-id }}
+          edit-mode: replace
           body: |
             @launchdarkly/js-client-sdk size report
             This is the brotli compressed size of the ESM build.