include matrix.PYTHON.VERSION in CI cache keys (#964) #1553

Job	Run time
tests on alpine	1m 17s
tests on alpine:aarch64	1m 8s
Python 3.8 on win32	4m 47s
tests on ubuntu-rolling:aarch64	1m 6s
Python 3.8 on macos-13	2m 1s
Python 3.13 on win32	3m 48s
3.13 on linux, Rust stable	18s
Python 3.8 on macos-latest	1m 31s
Python 3.13t on win32	7m 17s
3.13 on linux, Rust stable	40s
Python 3.13 on macos-13	1m 6s
Python 3.8 on win64	4m 32s
3.8 on linux, Rust stable	53s
Python 3.13 on macos-latest	46s
Python 3.13 on win64	2m 46s
3.9 on linux, Rust stable	52s
Python 3.13t on macos-13	2m 11s
Python 3.13t on win64	4m 46s
3.10 on linux, Rust stable	1m 16s
Python 3.13t on macos-latest	1m 35s
3.11 on linux, Rust stable	1m 7s
3.12 on linux, Rust stable	52s
3.13 on linux, Rust stable	1m 15s
3.13t on linux, Rust stable	1m 0s
pypy-3.9 on linux, Rust stable	1m 27s
pypy-3.10 on linux, Rust stable	1m 6s
3.13 on linux, Rust 1.64.0	2m 41s
3.13 on linux, Rust beta	54s
3.13 on linux, Rust nightly	59s
all-green	1s
	55m 58s

Provide feedback