Update actions to Node.js 24 compatible versions

Author: koppi

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
           - ubuntu-24.04
     runs-on: ${{ matrix.target }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install devscripts
       run: |

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
           - ubuntu-24.04
     runs-on: ${{ matrix.target }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install devscripts
       run: |