Bump peter-evans/slash-command-dispatch from 3 to 4 (#517)

Bumps [peter-evans/slash-command-dispatch](https://github.com/peter-evans/slash-command-dispatch) from 3 to 4.
- [Release notes](https://github.com/peter-evans/slash-command-dispatch/releases)
- [Commits](peter-evans/slash-command-dispatch@v3...v4)

---
updated-dependencies:
- dependency-name: peter-evans/slash-command-dispatch
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/command-dispatch.yml

@@ -14,7 +14,7 @@ jobs:
 
       - name: Slash Command Dispatch
         id: scd
-        uses: peter-evans/slash-command-dispatch@v3
+        uses: peter-evans/slash-command-dispatch@v4
         with:
           issue-type: pull-request
           dispatch-type: repository