x265: fix upstream repo url

[jnozsc]

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fix Homebrew/brew#8393

some context for reviewers, bitbucket sunsets mercurial support, all mercurial repos are not available any more https://bitbucket.org/blog/sunsetting-mercurial-support-in-bitbucket

[gromgit]

You may want to change the homepage URL too: https://www.videolan.org/developers/x265.html

[jnozsc]

The website seems a little misleading that it points to a hg repo.

Based on the maillist, the hg repo on hg.videolan.org is a mirror repo, not main repo https://mailman.videolan.org/pipermail/x265-devel/2020-June/013041.html

I suggest to keep the git repo as the homepage, at least before x265 team update the website you mentioned

[BrewTestBot]

🤖 A scheduled task has triggered a merge.