Update one of the diagnostic messages

Author: owen-mc

go/extractor/diagnostics/diagnostics.go

@@ -137,7 +137,7 @@ func EmitCannotFindPackage(pkgPath string) {
 func EmitNewerGoVersionNeeded() {
 	emitDiagnostic("go/autobuilder/newer-go-version-needed",
 		"Newer Go version needed",
-		"The version of Go available in the environment is lower than the version specified in the `go.mod` file. [Install a newer version](https://github.com/actions/setup-go#basic).",
+		"The detected version of Go is lower than the version specified in `go.mod`. [Install a newer version](https://github.com/actions/setup-go#basic).",
 		severityError, false,
 		true, true, true,
 		"", 0, 0, 0, 0,

go/ql/integration-tests/all-platforms/go/diagnostics/newer-go-version-needed/diagnostics.expected

@@ -1,6 +1,6 @@
 {
   "internal": false,
-  "markdownMessage": "The version of Go available in the environment is lower than the version specified in the `go.mod` file. [Install a newer version](https://github.com/actions/setup-go#basic).",
+  "markdownMessage": "The detected version of Go is lower than the version specified in `go.mod`. [Install a newer version](https://github.com/actions/setup-go#basic).",
   "severity": "error",
   "source": {
     "extractorName": "go",