Fix Semantic Versioning for Helm Chart

Can strict Semantic Versioning be used for the helm chart releases (use `1.5.0` instead of `v1.5.0`)?

In the `Chart.yaml` it says semantic versioning is required but the linked semver docs show the versions used for the dragonfly-operator are not valid.

https://github.com/dragonflydb/dragonfly-operator/blob/2192d38824f712d203d6a490cb625a5e12526fe5/charts/dragonfly-operator/Chart.yaml#L17-L18

> Is “v1.2.3” a semantic version?
No, “v1.2.3” is not a semantic version

https://semver.org/#is-v123-a-semantic-version

Below are some links with more details on this issue and how it breaks tools requiring Semantic Versioning.

[Helm Docs](https://helm.sh/docs/topics/charts/#charts-and-versioning)
[Helm Issue](https://github.com/helm/helm/issues/11107#issuecomment-1860317000)
[Dragonfly + Flux](https://github.com/dragonflydb/dragonfly-operator/issues/262)
[Kargo](https://github.com/akuity/kargo/issues/5604)