Fix grpc observability test error

gRPC Team Bot · copybara-github · commit a54730f4f974 · 2025-09-16T23:05:19.000-07:00
PiperOrigin-RevId: 807997058
diff --git a/BUILD b/BUILD
@@ -4959,6 +4959,7 @@ grpc_cc_library(
         "//src/core:http2_status",
         "//src/core:http2_ztrace_collector",
         "//src/core:init_internally",
+        "//src/core:instrument",
         "//src/core:internal_channel_arg_names",
         "//src/core:iomgr_fwd",
         "//src/core:iomgr_port",
