gh-146615: Fix format specifiers in `Python/` directory #2549

Job	Run time
x86_64-apple-darwin/clang	19m 42s
x86_64-unknown-linux-gnu/gcc	9m 48s
aarch64-apple-darwin/clang	10m 49s
aarch64-unknown-linux-gnu/gcc	7m 14s
x86_64-unknown-linux-gnu/gcc-free-threading	8m 44s
	56m 17s

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