chore: update bom table readme to exclude bigtable-stats (#6410)

Bigtable-stats is not published to c.g.c as its not meant for external usage, so excluding it from the table.

libraries-bom-table-generation/javaModulesMetadata.yaml

@@ -1,6 +1,5 @@
-# TODO:@alicejli Remove this file once Maven Central is updated with product links/name
-# https://github.com/googleapis/java-cloud-bom/issues/6098
 # This file was created by a one-time scrape of each module's .repo-metdata.json file
+# TODO: Create script to update this on an ongoing basis: https://github.com/googleapis/java-cloud-bom/issues/6409
 google-analytics-admin: https://developers.google.com/analytics, Analytics Admin
 google-analytics-data: https://developers.google.com/analytics/trusted-testing/analytics-data,
   Analytics Data

libraries-bom-table-generation/updateREADMETable.py

@@ -63,7 +63,8 @@ def run_maven_flatten_clean():
                    'google-cloud-core-grpc',
                    'google-cloud-core-http',
                    'google-cloud-firestore-admin',
-                   'google-cloud-spanner-executor'
+                   'google-cloud-spanner-executor',
+                   'google-cloud-bigtable-stats' #exclude per https://github.com/googleapis/java-bigtable/blob/v2.32.0/pom.xml#L334
                    ]
 regex_modules_to_skip = "(" + ")|(".join(modules_to_skip) + ")"