bug(docs): missing backend type in deployment examples

[migmartri]

The current deployment examples in the Helm chart and upstream docs are wrong when they showcase using a different secrets backend.

For example

$ helm install [RELEASE_NAME] oci://ghcr.io/chainloop-dev/charts/chainloop \
    # Open ID Connect (OIDC)
    # ...
    # Secrets backend
    --set secretsBackend.awsSecretManager.accessKey=[AWS ACCESS KEY ID] \
    --set secretsBackend.awsSecretManager.secretKey=[AWS SECRET KEY] \
    --set secretsBackend.awsSecretManager.region=[AWS region]\
    # Server Auth KeyPair
    # ...

it's missing the actual selection of the backend in the form of an additional flag --set secretsBackend.backend=awsSecretManager

so the example in fact should be

$ helm install [RELEASE_NAME] oci://ghcr.io/chainloop-dev/charts/chainloop \
    # Open ID Connect (OIDC)
    # ...
    # Secrets backend
+   --set secretsBackend.backend=awsSecretManager \
    --set secretsBackend.awsSecretManager.accessKey=[AWS ACCESS KEY ID] \
    --set secretsBackend.awsSecretManager.secretKey=[AWS SECRET KEY] \
    --set secretsBackend.awsSecretManager.region=[AWS region]\
    # Server Auth KeyPair
    # ...

Note, this problem also affects to its Google Cloud counterpart #225

• Update chart readme
• Update docs upstream