Update GitHub Artifact Actions

Author: renovate[bot]

.github/workflows/e2e-tests.yml

@@ -33,7 +33,7 @@ jobs:
           chmod +x ./bin/thv
 
       - name: Upload ToolHive binary
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5
         with:
           name: toolhive-binary
           path: ./bin/thv
@@ -73,7 +73,7 @@ jobs:
           go install github.com/onsi/ginkgo/v2/ginkgo@latest
 
       - name: Download ToolHive binary
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6
         with:
           name: toolhive-binary
           path: ./bin/
@@ -100,7 +100,7 @@ jobs:
 
       - name: Upload test results (${{ matrix.title }})
         if: always()
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5
         with:
           name: ${{ matrix.artifact }}
           path: |