Update rust-pycobertura-action #625

Job	Run time
Check version bump	8s
build (ubuntu-latest, nightly)	36s
build (windows-latest, stable)	2m 57s
Code coverage	42s
build (ubuntu-latest, stable)	54s
build (windows-latest, nightly)	1m 14s
Tag Release	0s
Create nightly	0s
Publish crates on crates.io	0s
	6m 31s

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