ci: make uv action tag explicit #6003

Job	Run time
E2E live-provider tests on Python 3.13	30m 14s
E2E shard 1 tests on Python 3.13	2m 8s
linting	10s
type-checking	14s
E2E shard 2 tests on Python 3.13	2m 51s
Unit tests on Python 3.10	17s
Unit tests on Python 3.12	16s
Unit tests on Python 3.14	18s
Unit tests on Python 3.13	15s
Unit tests on Python 3.11	14s
all-tests-passed	4s
	37m 1s

Provide feedback