Bump pullfrog/pullfrog in the high-frequency group across 1 directory

Bumps the high-frequency group with 1 update in the / directory: [pullfrog/pullfrog](https://github.com/pullfrog/pullfrog).


Updates `pullfrog/pullfrog` from 0.1.2 to 0.1.21
- [Release notes](https://github.com/pullfrog/pullfrog/releases)
- [Commits](pullfrog/pullfrog@c8888ce...8ea3957)

---
updated-dependencies:
- dependency-name: pullfrog/pullfrog
  dependency-version: 0.1.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: high-frequency
...

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

Author: dependabot[bot]

.github/workflows/pullfrog.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           fetch-depth: 1
       - name: Run agent
-        uses: pullfrog/pullfrog@c8888cecde9d0b2fce7b26119205bdfc7ea8d9a2 # v0.1.2
+        uses: pullfrog/pullfrog@8ea3957330b033294803105b0d15b34461fdfb3a # v0.1.21
         with:
           prompt: ${{ inputs.prompt }}
         env: