Add the missing "v" in front of k3s version #2192

Job	Run time
core-ubuntu-22-lts / build	12m 7s
core-ubuntu-24-10 / build	10m 35s
core-ubuntu-24-lts / build	10m 9s
core-alpine / build	13m 59s
standard / build	11m 22s
bundles / test	3m 33s
install / test	3m 32s
acceptance / test	3m 44s
install-secureboot / test	3m 45s
install-target / test	3m 32s
netboot / test	3m 43s
reset / test	3m 43s
upgrade-latest / test	3m 45s
upgrade / test	3m 32s
custom-partitioning (ubuntu, 24.04) / test	3m 27s
encryption (local-encryption) / test	3m 43s
encryption (remote-auto) / test	3m 43s
encryption (remote-https-bad-cert) / test	3m 41s
encryption (remote-https-pinned) / test	3m 28s
encryption (remote-static) / test	3m 33s
zfs / test	1m 38s
encryption-alpine	1s
acceptance-alpine	1s
netboot-alpine	1s
reset-alpine	1s
upgrade-alpine	1s
install-alpine	1s
	1h 54m 20s

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