CI: Update setup-go action to v5

Author: orangejulius

.github/workflows/_test.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           node-version: '${{ matrix.node-version }}'
       - name: 'Install Golang ${{ matrix.go-version }}'
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
           go-version: '${{ matrix.go-version }}'
       - name: Run Go unit tests