Fix "golangci-lint: not found" error in master "Run tests and lint" job (#267)

Signed-off-by: Sean Lin <sean@union.ai>

Author: mayitbeegh

.github/workflows/master.yml

@@ -49,6 +49,10 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: "0"
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.18'
       - name: Unit Tests
         run: make install && make test_unit_codecov
       - name: Push CodeCov