Update to Python 3.13.7 (#18736)
Summary of the issue:
> 3.13.7 is an expedited release to fix a significant issue with the
3.13.6 release:
>
> - [gh-137583](https://github.com/python/cpython/issues/137583):
Regression in ssl module between 3.13.5 and 3.13.6: reading from a
TLS-encrypted connection blocks
>
> A few other bug fixes (which would otherwise have waited until the
next release) are also included.
Description of user facing changes:
None
Description of developer facing changes:
See above
Description of development approach:
Change `3.13.6` to `3.13.7`.
Testing strategy:
Ran from source. CI.
Known issues with pull request:
None
