fix: "requires_billing " should be "requires_billing" (#498)

Benjamin E. Coe · JustinBeckwith · commit c9f6f7e91d9a · 2019-06-12T22:14:25.000-07:00
diff --git a/.repo-metadata.json b/.repo-metadata.json
@@ -9,5 +9,5 @@
   "repo": "googleapis/nodejs-bigtable",
   "distribution_name": "@google-cloud/bigtable",
   "api_id": "bigtable.googleapis.com",
-  "requires_billing ": true
-}
+  "requires_billing": true
+}
