oppgrader actions/setup-node@v6 og actions/checkout@v5 (#3906)

oppgrader actions/checkout@v5 og actions/setup-node@v6 i GHA

Author: sirimykland

.github/workflows/valider-pull-request.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
@@ -18,7 +18,7 @@ jobs:
         env:
           NPM_AUTH_TOKEN: ${{ secrets.READER_TOKEN }}
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22.17.1
           cache: 'yarn'
@@ -49,7 +49,7 @@ jobs:
       contents: read
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
@@ -61,7 +61,7 @@ jobs:
         env:
           NPM_AUTH_TOKEN: ${{ secrets.READER_TOKEN }}
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22.17.1
           cache: 'yarn'