Fix Bazel BUILD
diff --git a/BUILD b/BUILD
index 76d5026..4606300 100644
--- a/BUILD
+++ b/BUILD
@@ -2129,7 +2129,7 @@
         "src/cpp/ext/filters/census/channel_filter.cc",
         "src/cpp/ext/filters/census/client_filter.cc",
         "src/cpp/ext/filters/census/context.cc",
-        "src/cpp/ext/filters/census/grpc_context.cc",
+        "src/core/ext/filters/census/grpc_context.cc",
         "src/cpp/ext/filters/census/grpc_plugin.cc",
         "src/cpp/ext/filters/census/measures.cc",
         "src/cpp/ext/filters/census/rpc_encoding.cc",