Bump src/deps/pybind11 from `8a099e4` to `7c4ac91`

[dependabot[bot]]

Bumps src/deps/pybind11 from 8a099e4 to 7c4ac91.

Commits

• 7c4ac91 Add type[T] support to typing.h (#5166)
• 68405a1 Add Union and Optional to typing.h (#5165)
• ab955f1 Fix refcount bug involving trampoline functions with PyObject * return type...
• 35ff42b Add a pybind function to clear a list. (#5153)
• 9b3a200 fix(cmake): improved cross-compilation support (#5083)
• b9794be chore(deps): update pre-commit hooks (#5154)
• 1a0ff40 tests: avoid immortal objects in tests (#5150)
• 7187894 fix(cmake): old cmake boost bug (#5149)
• ae6432b fix: Python 3.13t with GIL (#5139)
• a5b9e50 fix: added check on iterator end position (#5129)
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #1768.