Update regex for gerrit change numbers
A # character was added to change IDs in T358940, for better support of 7-digit IDs. Update the regex used by the bot so that it works with both old-style and new-style comments.
Bug: T363573
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A # character was added to change IDs in T358940, for better support of 7-digit IDs. Update the regex used by the bot so that it works with both old-style and new-style comments.
Bug: T363573