docs(samples): Update Region Tags

[mukund-ananthu]

Update Region Tags to be consistent with the tags used in other Pub/Sub Client libraries

[snippet-bot]

Here is the summary of changes.

You are about to add 2 region tags.

• samples/snippets/publisher.py:72, tag pubsub_create_topic_with_kinesis_ingestion
• samples/snippets/publisher.py:115, tag pubsub_update_topic_type

You are about to delete 2 region tags.

• samples/snippets/publisher.py:72, tag pubsub_create_topic_kinesis_ingestion
• samples/snippets/publisher.py:115, tag pubsub_update_topic_kinesis_ingestion

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