go version to take hard dependency on go 1.20

Author: hexoscott

.github/workflows/build.yml

@@ -88,7 +88,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v4
         with:
-          go-version: '^1.20.0' # The Go version to download (if necessary) and use.
+          go-version: '1.20' # The Go version to download (if necessary) and use.
       - run: go version
 
       - uses: actions/checkout@v3