fix: rename `.gitattribute` to `.gitattributes` so git actually reads… #2432

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	31s
checks / test (3.10, lowest-direct, windows-latest)	3m 19s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 5s
checks / test (3.10, locked, ubuntu-latest)	1m 2s
checks / test (3.12, lowest-direct, windows-latest)	3m 48s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.14, lowest-direct, windows-latest)	2m 49s
checks / test (3.13, locked, windows-latest)	2m 26s
checks / test (3.13, locked, ubuntu-latest)	1m 3s
checks / test (3.12, locked, windows-latest)	3m 32s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.11, lowest-direct, windows-latest)	2m 52s
checks / test (3.10, locked, windows-latest)	2m 39s
checks / test (3.11, locked, windows-latest)	2m 44s
checks / test (3.13, lowest-direct, windows-latest)	3m 7s
checks / test (3.14, locked, windows-latest)	3m 33s
checks / test (3.11, locked, ubuntu-latest)	1m 0s
checks / test (3.12, locked, ubuntu-latest)	1m 5s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 29s
checks / test (3.14, locked, ubuntu-latest)	2m 35s
all-green	5s
	44m 22s

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