Update GitHub Artifact Actions

Author: renovate[bot]

.github/workflows/firebase-hosting-merge.yml

@@ -50,7 +50,7 @@ jobs:
         env:
           REACT_APP_VERSION: ${{ github.sha }}
       - name: Archive production artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: build
           path: |
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
       - name: Copy favicon
         run: cp build/bel-d.ico build/favicon.ico
       - uses: FirebaseExtended/action-hosting-deploy@v0
@@ -78,7 +78,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
       - name: Copy favicon
         run: cp build/bel-s.ico build/favicon.ico
       - uses: FirebaseExtended/action-hosting-deploy@v0
@@ -94,7 +94,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
       - name: Copy favicon
         run: cp build/bel-p.ico build/favicon.ico
       - uses: FirebaseExtended/action-hosting-deploy@v0