Bump andymckay/append-gist-action

Bumps [andymckay/append-gist-action](https://github.com/andymckay/append-gist-action) from 1fbfbbce708a39bd45846f0955ed5521f2099c6d to 6e8d64427fe47cbacf4ab6b890411f1d67c07f3e.
- [Release notes](https://github.com/andymckay/append-gist-action/releases)
- [Commits](andymckay/append-gist-action@1fbfbbc...6e8d644)

---
updated-dependencies:
- dependency-name: andymckay/append-gist-action
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/badges.yml

@@ -33,7 +33,7 @@ jobs:
           path: downloads.svg
 
       - name: Upload badge to Gist
-        uses: andymckay/append-gist-action@1fbfbbce708a39bd45846f0955ed5521f2099c6d
+        uses: andymckay/append-gist-action@6e8d64427fe47cbacf4ab6b890411f1d67c07f3e
         with:
           token: ${{ secrets.GIST_TOKEN }}
           gistURL: https://gist.githubusercontent.com/EnricoMi/612cb538c14731f1a8fefe504f519395
@@ -62,7 +62,7 @@ jobs:
           path: workflows.svg
 
       - name: Upload badge to Gist
-        uses: andymckay/append-gist-action@1fbfbbce708a39bd45846f0955ed5521f2099c6d
+        uses: andymckay/append-gist-action@6e8d64427fe47cbacf4ab6b890411f1d67c07f3e
         with:
           token: ${{ secrets.GIST_TOKEN }}
           gistURL: https://gist.githubusercontent.com/EnricoMi/612cb538c14731f1a8fefe504f519395

.github/workflows/test-results.yml

@@ -64,7 +64,7 @@ jobs:
         # Upload only for master branch and not for scheduled event
         if: >
           github.event_name == 'workflow_run' && github.event.workflow_run.head_branch == 'master' && github.event.workflow_run.event != 'schedule'
-        uses: andymckay/append-gist-action@1fbfbbce708a39bd45846f0955ed5521f2099c6d
+        uses: andymckay/append-gist-action@6e8d64427fe47cbacf4ab6b890411f1d67c07f3e
         with:
           token: ${{ secrets.GIST_TOKEN }}
           gistURL: https://gist.githubusercontent.com/EnricoMi/612cb538c14731f1a8fefe504f519395