Bump actions/checkout from 4 to 5 (#169)

Author: dependabot[bot]

.github/workflows/dockerimage.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     # https://github.com/FiloSottile/mkcert#installation
     - name: Install and setup mkcert

.github/workflows/push-to-ghcr.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       # https://github.com/marketplace/actions/push-to-ghcr
       - name: Build and publish a Docker image for macbre/nginx-http3