Update canonical/charming-actions action to v2.6.3 #414

Job	Run time
Check libraries	36s
Unit test charm	20s
Lint / Lint .github/workflows/	4s
Lint / tox run -e lint	16s
Build charms (.) / Collect bases for charm \| .	17s
Build charms (tests/integration/application) / Collect bases for charm \| tests/integration/application	14s
Build charms (tests/integration/application) / Build charm \| base #0	2m 31s
Build charms (.) / Build charm \| base #0	3m 23s
Integration test charm / 3.4.4 \| amd64 \| Collect integration test groups	25s
Integration test charm / external_relations/test_charm.py \| group 1	12m 7s
Integration test charm / test_charm.py \| group 1	21m 52s
Integration test charm / tls_tests/test_tls.py \| group 1	1h 1m 0s
Integration test charm / upgrade_tests/test_rollback.py \| group 1	15m 11s
Integration test charm / upgrade_tests/test_upgrade.py \| group 1	14m 6s
Integration test charm / (beta) Publish Allure report	0s
	2h 12m 22s

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