Update pybind11 version to 2.13.1 #686

Job	Run time
Documentation	4m 4s
Python 3.8 • ubuntu-latest	1m 45s
Python 3.9 • ubuntu-latest	1m 53s
Python 3.10 • ubuntu-latest	1m 53s
Python 3.11 (with Praat tests) • ubuntu-latest	17m 48s
Python 3.12 (with Praat tests) • ubuntu-latest	17m 18s
Python pypy-3.8 • ubuntu-latest	2m 26s
Python pypy-3.9 (with Praat tests) • ubuntu-latest	17m 55s
Python pypy-3.10 (with Praat tests) • ubuntu-latest	20m 53s
Python 3.11 (GCC 13) • ubuntu-24.04	1m 56s
Python 3.11 (Clang 18) • ubuntu-24.04	1m 48s
Python 3.11 (Release) • ubuntu-latest	1m 37s
Python 3.8 • macos-13	3m 39s
Python 3.11 (with Praat tests) • macos-latest	10m 25s
Python 3.12 • macos-latest	1m 59s
Python 3.11 (Release) • macos-latest	1m 58s
Python pypy-3.10 • macos-13	6m 8s
Python 3.8 • windows-latest	16m 34s
Python 3.11 (with Praat tests) • windows-latest	38m 31s
Python 3.12 • windows-latest	16m 8s
Python 3.8 (32-bit) • windows-latest	16m 44s
Python 3.11 (32-bit) • windows-latest	16m 31s
Python 3.11 (Release) • windows-latest	16m 23s
Python pypy-3.10 • windows-latest	20m 22s
	4h 16m 38s

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