fix(deps): update dependency pygit2 to v1.16.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pygit2 (changelog)	==1.15.0 -> ==1.16.0

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Release Notes

libgit2/pygit2 (pygit2)

v1.16.0

Compare Source

• Add support for Python 3.13

• Drop support for Python 3.9

• New Repository.hashfile(...)
  #​1298

• New Option.GET_MWINDOW_FILE_LIMIT and Option.SET_MWINDOW_FILE_LIMIT
  #​1312

• Fix overriding certificate_check(...) callback via argument to RemoteCallbacks(...)
  #​1321

• Add py.typed
  #​1310

• Fix discover_repository(...) annotation
  #​1313

v1.15.1

Compare Source

• New Repository.revert(...)
  #​1297

• New optional depth argument in submodules add() and update() methods
  #​1296

• Now Submodule.url returns None when the submodule does not have a url
  #​1294

• Fix use after free bug in error reporting
  #​1299

• Fix Submodule.head_id when the submodule is not in the current HEAD tree
  #​1300

• Fix Submodule.open() when subclassing Repository
  #​1295

• Fix error in the test suite when running with address sanitizer
  #​1304
  #​1301

• Annotations and documentation fixes
  #​1293

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