[SB] Updates to the SBO Getting started section of OCP 4.11 docs

1. Update the Getting Started section of the OCP 4.11 docs with the following changes in the Prerequisites section: You have installed the 5.1.2 version of the Crunchy Postgres for Kubernetes Operator from OperatorHub using the v5 Update channel. 
2. Also, in the Deploying the Spring PetClinic sample application section, add step 3: 

• Expose the service to create a route for your application
  oc expose service spring-petclinic -n my-petclinic

The output verifies that the `spring-petclinic` service is exposed and a route for the Spring PetClinic sample application is created:
Example output

route.route.openshift.io/spring-petclinic exposed

3. Also, in the Creating a PostgreSQL database instance section, replace the YAML with the following one in step 1:

apiVersion: postgres-operator.crunchydata.com/v1beta1
kind: PostgresCluster
metadata:
  name: hippo
spec:
  image: registry.developers.crunchydata.com/crunchydata/crunchy-postgres:ubi8-14.4-0
  postgresVersion: 14
  instances:
    - name: instance1
      dataVolumeClaimSpec:
        accessModes:
        - "ReadWriteOnce"
        resources:
          requests:
            storage: 1Gi
  backups:
    pgbackrest:
      image: registry.developers.crunchydata.com/crunchydata/crunchy-pgbackrest:ubi8-2.38-0
      repos:
      - name: repo1
        volume:
          volumeClaimSpec:
            accessModes:
            - "ReadWriteOnce"
            resources:
              requests:
                storage: 1Gi

4. Ensure to change the example outputs as applicable.