Update index.html dependency with Bazel section.
diff --git a/index.html b/index.html
index bfccd82..d571cfa 100644
--- a/index.html
+++ b/index.html
@@ -156,7 +156,7 @@
 git_repository(
     name = "com_github_gflags_gflags",
     remote = "https://github.com/gflags/gflags.git",
-    tags = "v2.2.2"
+    tags = ["v2.2.2"]
 )
 </pre>