chore: Update actions/create-github-app-token action to v3

Author: grafanarenovatebot[bot]

actions/renovate-approve/action.yaml

@@ -39,7 +39,7 @@ runs:
 
     - name: Create GitHub app token
       id: app-token
-      uses: actions/create-github-app-token@fee1f7d63c2ff003460e3d139729b119787bc349 # v2
+      uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3
       with:
         app-id: ${{ fromJSON(steps.get-secrets.outputs.secrets).SM_APPROVER_APP_ID }}
         private-key: ${{ fromJSON(steps.get-secrets.outputs.secrets).SM_APPROVER_PRIVATE_KEY }}

actions/renovate/action.yaml

@@ -50,7 +50,7 @@ runs:
 
     - name: create GitHub app token
       id: app-token
-      uses: actions/create-github-app-token@fee1f7d63c2ff003460e3d139729b119787bc349 # v2
+      uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859 # v3
       with:
         app-id: ${{ env.GRAFANA_RENOVATE_APP_ID }}
         private-key: ${{ env.GRAFANA_RENOVATE_PRIVATE_KEY }}