Added a description that go-version should be specified as a string type (#367)

README.md

@@ -237,7 +237,7 @@ input for the action:
 uses: actions/setup-go@v4
 with:
   token: ${{ secrets.GH_DOTCOM_TOKEN }}
-  go-version: 1.18
+  go-version: '1.18'
 ```
 
 If the runner is not able to access github.com, any Go versions requested during a workflow run must come from the

action.yml

@@ -3,7 +3,7 @@ description: 'Setup a Go environment and add it to the PATH'
 author: 'GitHub'
 inputs:
   go-version:
-    description: 'The Go version to download (if necessary) and use. Supports semver spec and ranges.'
+    description: 'The Go version to download (if necessary) and use. Supports semver spec and ranges. Be sure to enclose this option in single quotation marks.'
   go-version-file:
     description: 'Path to the go.mod or go.work file.'
   check-latest: