fix duplicate tags

Author: taylor-swanson

packages/cef/data_stream/log/elasticsearch/ingest_pipeline/default.yml

@@ -131,13 +131,13 @@ processors:
       ignore_missing: true
       pattern: '[:.]'
       replacement: '-'
-      tag: gsub mac
+      tag: gsub_destination_mac
   - gsub:
       field: source.mac
       ignore_missing: true
       pattern: '[:.]'
       replacement: '-'
-      tag: gsub mac
+      tag: gsub_source_mac
   - uppercase:
       field: destination.mac
       ignore_missing: true