chore(deps): update github artifact actions (#1679)

Author: renovate-bot

.github/workflows/ci.yaml

@@ -32,7 +32,7 @@ jobs:
       # Exclude all of the grpc_service_config package (it is generated).
       run: go mod download && go vet $(go list ./... | grep -v 'grpc_service_config') > govet.txt && ! [ -s govet.txt ]
       if: ${{ always() }}
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       if: ${{ always() }}
       with:
         name: linting-results

.github/workflows/deps.yaml

@@ -38,7 +38,7 @@ jobs:
     - name: Prepare repositories.bzl payload
       if: steps.update.outputs.changed
       run: tar czf repos.tgz repositories.bzl
-    - uses: actions/upload-artifact@v5
+    - uses: actions/upload-artifact@v6
       if: steps.update.outputs.changed
       with:
         name: repositories
@@ -51,7 +51,7 @@ jobs:
     - uses: actions/checkout@v4
       with:
         ref: main
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: repositories
     - name: Expand repositories archive