CLOUD-838 - Fix dataVolumeClaimSpec...storage in README

[mrrsm]

instances.walVolumeClaimSpec.resources.requests.storage was duplicated for dataVolumeClaimSpec

[it-percona-cla]

All committers have signed the CLA.

[egegunes]

@mrrsm please bump the version

[mrrsm]

@egegunes Do you want a version bump for a docs only change?

[egegunes]

@tplavcic does the requirement for bump caused by the lint-test check or does helm require bump for README change?

[tplavcic]

@egegunes @mrrsm Each change in helm charts triggers release so the version needs to be bumped since we cannot re-release old version. I agree it's a bit silly in this case, I'll check if chart releaser and linter can be configured differently, but for now it is like this.

[tplavcic]

Thank you very much for the contribution!