Bump actions/download-artifact from 3 to 4

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/dotnetcore.yml

@@ -155,7 +155,7 @@ jobs:
 #      with:
 #        creds: ${{ secrets.AZURE_SP_PROBOT }}  
 #    - name: Download webapp artifact
-#      uses: actions/download-artifact@v3
+#      uses: actions/download-artifact@v4
 #      with:
 #        name: probot 
 #    - name: Deploy probot to Azure WebApp
@@ -185,22 +185,22 @@ jobs:
 
     #Download the artifacts from GitHub
     - name: Download serviceapp artifact
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: serviceapp 
         path: serviceapp
     - name: Download webapp artifact
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: webapp  
         path: webapp
     - name: Download webapp artifact
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: functionapp  
         path: functionapp   
     - name: Download functionaltests artifact
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: functionaltests 
         path: functionaltests