Update peter-evans/repository-dispatch digest to 28959ce (#5177)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/notify-downstream.yaml

@@ -19,7 +19,7 @@ jobs:
         runs-on: ubuntu-24.04
         steps:
             - name: Notify matrix-react-sdk repo that a new SDK build is on develop so it can CI against it
-              uses: peter-evans/repository-dispatch@5fc4efd1a4797ddb68ffd0714a238564e4cc0e6f # v4
+              uses: peter-evans/repository-dispatch@28959ce8df70de7be546dd1250a005dd32156697 # v4
               with:
                   token: ${{ secrets.ELEMENT_BOT_TOKEN }}
                   repository: ${{ matrix.repo }}