Update README.md

Author: perazz

README.md

@@ -26,7 +26,25 @@ __e.g.:__
 
 __`github-token`__ (*only needed if `fpm-version` is `'latest'` or not specified*), an access token used to query the latest version of `fpm`. Set to `${{ secrets.GITHUB_TOKEN }}` to use the existing github actions token.
 
-__`fpm-version`__ (*optional,default:*`'latest'`) the tag corresponding a Github release from which to fetch the `fpm` binary.
-  - If set to `'latest'` (_default_) then the latest `fpm` release at [fortran-lang/fpm](https://github.com/fortran-lang/fpm/releases/latest) will be substituted. `github-token` must be provided if `fpm-version` is `'latest'`.
+__`fpm-version`__ (*optional, default:* see below) the tag corresponding to a Github release from which to fetch the `fpm` binary.
+  - If set to `'latest'` then the latest `fpm` release at [fortran-lang/fpm](https://github.com/fortran-lang/fpm/releases/latest) will be substituted. `github-token` must be provided if `fpm-version` is `'latest'`.
 
 __`fpm-repository`__ (*optional, default:* `https://github.com/fortran-lang/fpm`) which Github fork to fetch release binaries from.
+
+### Default `fpm-version` for Each Release
+
+Starting with `v7`, `setup-fpm` is pinpointed to `fpm` version `0.11.0` to ensure compatibility with newer features and changes. 
+Previous versions default to the latest stable release, which is fetched automatically when `fpm-version` is set to `'latest'`.
+
+| Release Version | Default `fpm-version` |
+|-----------------|-----------------------|
+| v1              | latest                |
+| v2              | latest                |
+| v3              | latest                |
+| v4              | latest                |
+| v5              | latest                |
+| v6.0.1          | latest                |
+| v6              | latest                |
+| v6.1.0          | latest                |
+| v7              | 0.11.0                |
+