Accept rust-analyzer as language server

Expand the regular expression to match rls or rust-analyzer language
servers. Do not change any other UI component as this support is still
experimental.

org.eclipse.corrosion/src/org/eclipse/corrosion/RustManager.java

@@ -44,7 +44,7 @@
 @SuppressWarnings("restriction")
 public class RustManager {
 	private static final IPreferenceStore STORE = CorrosionPlugin.getDefault().getPreferenceStore();
-	public static final String RLS_VERSION_FORMAT_REGEX = "^rls.*$"; //$NON-NLS-1$
+	public static final String RLS_VERSION_FORMAT_REGEX = "^(rls|rust-analyzer).*$"; //$NON-NLS-1$
 	public static final String CARGO_VERSION_FORMAT_REGEX = "^cargo .*$"; //$NON-NLS-1$
 	public static final String RUSTUP_VERSION_FORMAT_REGEX = "^rustup .*$"; //$NON-NLS-1$
 	public static final Pattern RLS_VERSION_FORMAT_PATTERN = Pattern.compile(RLS_VERSION_FORMAT_REGEX);