Update git submodules

* Update extensions/Popups from branch 'wmf/1.44.0-wmf.6'
  to 25d940052d0ee5e8c6428fab934d2a2faba5baba
  - Kick bundlesize out of package.json
    
    This pulled in ancient versions of brotli-size (unlikely to be fixed:
    siddharthkp/bundlesize#370 (comment))
    which broke CI on Node 20. IIUC, it shouldn’t even be needed anymore now
    that bundle size can be tested via BundleSizeTestBase instead; but in
    any case this can be figured out later, *after* CI is restored for the
    many extensions that pull in Popups.
    
    Bug: T382192
    Bug: T360590
    Change-Id: I86413a7707cbd33fd473f8a1daf6c7866fbb473f
    (cherry picked from commit 300e32b4d83070572812f094bd060dfd69d37362)