doc: remove stray references to Go

Replace with CUE.

Also make clear that 'latest' is a version query, not a version.

Also switch to using CUE v0.6.0 in this repo, given that is currently
the latest.

Fixes cue-lang/cue#2270.

Signed-off-by: Paul Jolly <[email protected]>

Author: myitcv

.github/workflows/build-and-test.yml

@@ -6,8 +6,8 @@ Actions runner***
 Use this action in your GitHub Actions workflow to install a specific version of
 [CUE](https://cuelang.org) on your runner. The input `version` is a
 [version](https://go.dev/ref/mod#versions) string like `v0.6.0`, or
-`v0.6.0-beta.1`. You can also use the keyword `latest` (default) to use the
-latest release of `cue`. Releases and pre-releases of `cue` are listed
+`v0.6.0-beta.1`. You can also use the version query `latest` (default) to use
+the latest release of `cue`. Releases and pre-releases of `cue` are listed
 [here](https://github.com/cue-lang/cue/releases).
 
 ```

README.md

@@ -4,9 +4,9 @@ import "json.schemastore.org/github"
 
 action: github.#Action & {
 	name:        "Setup CUE environment"
-	description: "Setup a Go environment and add it to the PATH."
+	description: "Setup a CUE environment and add it to the PATH."
 	inputs: version: {
-		description: #"The CUE version to setup. Must be a valid semantic version string like "v0.4.0" or "latest""#
+		description: #"The CUE version to setup. Must be a valid version string like "v0.6.0", or "latest""#
 		required:    true
 		default:     "latest"
 	}

action.cue

@@ -40,7 +40,7 @@ buildAndTest: github.#Workflow & {
 			{
 				name: "Use CUE"
 				uses: "./"
-				with: version: "v0.4.3"
+				with: version: "v0.6.0"
 			},
 			{
 				name: "Check CUE version"