Upgrade actions versions

Author: gunndabad

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     name: "Build & package"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0  # Important for minver to create the right version number
 
@@ -34,7 +34,7 @@ jobs:
         MINVERBUILDMETADATA: ${{ env.GITHUB_RUN_NUMBER }}
 
     - name: Publish package artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: Dfe.Analytics.nupkg
         path: |