build(deps): bump peter-evans/repository-dispatch from 2 to 3

Bumps [peter-evans/repository-dispatch](https://github.com/peter-evans/repository-dispatch) from 2 to 3.
- [Release notes](https://github.com/peter-evans/repository-dispatch/releases)
- [Commits](peter-evans/repository-dispatch@v2...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/sandbox-deletion.yaml

@@ -17,7 +17,7 @@ jobs:
           owner: ${{ github.repository_owner }}
 
       - name: Repository dispatch
-        uses: peter-evans/repository-dispatch@v2
+        uses: peter-evans/repository-dispatch@v3
         with:
           token: ${{ steps.app-token.outputs.token }}
           repository: kubeshop/testkube-deployment

.github/workflows/sandbox.yaml

@@ -800,7 +800,7 @@ jobs:
           owner: ${{ github.repository_owner }}
 
       - name: Repository dispatch
-        uses: peter-evans/repository-dispatch@v2
+        uses: peter-evans/repository-dispatch@v3
         with:
           token: ${{ steps.app-token.outputs.token }}
           repository: kubeshop/testkube-deployment