I couldn’t find one thats just updated. Theres the Steam news feed, but thats like half ads and sales.
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steamdb.info seems to have this
Looks like it has an RSS feed in the patches section that will do the job if needed, but it also includes a lot of tiny patches that don’t have changelogs and don’t even show up in Steam or Gaijin’s main news sections. It also doesn’t help that it uses a copy of the patchnotes with some iffy formatting, but again, I can work with it in leau of a better option.