Merge upstream 'main' from actions/setup-go into

IvanZosimov/modules-caching

README.md

@@ -124,6 +124,21 @@ steps:
       cache: true
       cache-dependency-path: subdir/go.sum
   - run: go run hello.go
+  ```
+## Getting go version from the go.mod file
+
+The `go-version-file` input accepts a path to a `go.mod` file containing the version of Go to be used by a project. As the `go.mod` file contains only major and minor (e.g. 1.18) tags, the action will search for the latest available patch version sequentially in the runner's directory with the cached tools, in the [version-manifest.json](https://github.com/actions/go-versions/blob/main/versions-manifest.json) file or at the go servers.
+
+If both the `go-version` and the `go-version-file` inputs are provided then the `go-version` input is used.
+> The action will search for the `go.mod` file relative to the repository root
+
+```yaml
+steps:
+- uses: actions/checkout@v3
+- uses: actions/setup-go@v3
+  with:
+    go-version-file: 'path/to/go.mod'
+- run: go version
 ```
 
 ## Matrix testing