update version in prep for v0.3.1

[acornett21]

• release prep pr
• pr after this is released to fix the scafolding since that does a go get and errors.

ERRO[0003] error creating the project: /helm-operator-plugins/bin/helm-operator-plugins init --plugins hybrid/v1-alpha --repo github.com/example/memcached-operator failed with error: (exit status 1) time="2024-07-17T21:46:25Z" level=info msg="Writing kustomize manifests for you to edit..."
Writing scaffolds for you to edit...
time="2024-07-17T21:46:25Z" level=info msg="Get helm-operator-plugins:\n$ go get github.com/operator-framework/helm-operator-plugins@v0.3.1"
go: github.com/operator-framework/helm-operator-plugins@v0.3.1: invalid version: unknown revision v0.3.1
Error: failed to initialize project: unable to scaffold with "hybrid.helm.sdk.operatorframework.io/v1-alpha": exit status 1