Update actions/checkout action to v3

Signed-off-by: Renovate Bot <[email protected]>

| datasource  | package          | from | to |
| ----------- | ---------------- | ---- | -- |
| github-tags | actions/checkout | v2   | v3 |

Author: renovate-bot

.github/workflows/release-on-milestone-closed-triggering-release-event.yml

@@ -18,7 +18,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: "actions/checkout@v2"
+              uses: actions/checkout@v3
 
             - name: "Release"
               uses: "laminas/automatic-releases@v1"