fix ci failure

Author: bajajneha27

google/cloud/storage/internal/tracing_connection.cc

@@ -109,7 +109,7 @@ void TracingConnection::EnrichSpan(opentelemetry::trace::Span& span,
 }
 
 void TracingConnection::EnrichSpan(opentelemetry::trace::Span& span,
-                                   storage::BucketMetadata const& metadata) {
+                                   storage::BucketMetadata const& metadata) const {
   auto const enabled =
       options().get<storage_experimental::OTelSpanEnrichmentOption>();
   if (!enabled) return;

google/cloud/storage/internal/tracing_connection.h

@@ -186,7 +186,7 @@ class TracingConnection : public storage::internal::StorageConnection {
   void EnrichSpan(opentelemetry::trace::Span& span,
                   std::string const& bucket_name);
   void EnrichSpan(opentelemetry::trace::Span& span,
-                  storage::BucketMetadata const& metadata);
+                  storage::BucketMetadata const& metadata) const;
   static void EnrichSpan(opentelemetry::trace::Span& span,
                          BucketCacheEntry const& entry);
   void MaybeTriggerBackgroundFetch(std::string const& bucket_name);