[mythtv] Mythweb tags updated

[Stuart Auchterlonie]

Hi All,

( tldr; run `git fetch --tags` in your mythweb checkout)

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It was noticed that the mythweb tag for v30-Pre was not an annotated
tag as it should have been. I've updated the tag and repushed it.

Please run `git fetch --tags` in your mythweb checkout to avoid
any possible issues.


Regards
Stuart