ci: update python version for CI #1272

Job	Run time
Golangci Lint (.)	1m 27s
drenv tests (3.10)	1m 30s
Golangci Lint (api)	33s
Linters	1m 19s
Build image	2m 21s
drenv tests (3.11)	1m 23s
Golangci Lint (e2e)	53s
drenv tests (3.12)	1m 21s
drenv tests (3.13)	1m 35s
ramenctl tests (3.10)	13s
drenv tests (3.14-dev)	1m 38s
Unit tests	3m 44s
ramenctl tests (3.11)	15s
ramenctl tests (3.12)	22s
ramenctl tests (3.13)	24s
ramenctl tests (3.14-dev)	37s
Check artifacts and operator deployment (1.29.1)	1m 34s
Publish built image	0s
	21m 9s

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