Fix the fallback path to the l10n folder

If the language server client doesn't specify the location of the l10n
folder, then the language server falls back to a path relative to the
complied file.
This path was wrong; `server.js` is in `./out/server/src/server.js`,
so the relative path of the `l10n` folder is `../../../l10n` instead of
`../l10n`.

Signed-off-by: David Thompson <davthomp@redhat.com>

Author: datho7561

src/yamlServerInit.ts

@@ -59,7 +59,7 @@ export class YAMLServerInit {
 
   public async setupl10nBundle(params: InitializeParams): Promise<void> {
     const __dirname = path.dirname(__filename);
-    const l10nPath: string = params.initializationOptions?.l10nPath || path.join(__dirname, '../l10n');
+    const l10nPath: string = params.initializationOptions?.l10nPath || path.join(__dirname, '../../../l10n');
     const locale: string = params.locale || 'en';
     if (l10nPath) {
       const bundleFile = !fs.existsSync(path.join(l10nPath, `bundle.l10n.${locale}.json`))