🐛 Update getting started notes

[furkatgofurov7]

What this PR does / why we need it:
Makes sure the getting started guide for creating CAPRKE2+CAPD works as expected when following the guide

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests

[yiannistri]

I've tested the steps from the guide and it works great 💯

It took about 20-25 mins on my local to get all 5 nodes up and running.

kubectl get machine -n example
NAME                                 CLUSTER          NODENAME                                 PROVIDERID                                          PHASE     AGE     VERSION
capd-rke2-test-control-plane-ftt64   capd-rke2-test   capd-rke2-test-control-plane-ftt64       docker:////capd-rke2-test-control-plane-ftt64       Running   3m23s   v1.27.3+rke2r1
capd-rke2-test-control-plane-tshb5   capd-rke2-test   capd-rke2-test-control-plane-tshb5       docker:////capd-rke2-test-control-plane-tshb5       Running   13m     v1.27.3+rke2r1
capd-rke2-test-control-plane-vdxtk   capd-rke2-test   capd-rke2-test-control-plane-vdxtk       docker:////capd-rke2-test-control-plane-vdxtk       Running   20m     v1.27.3+rke2r1
worker-md-0-fx7n5-hmdv2              capd-rke2-test   capd-rke2-test-worker-md-0-fx7n5-hmdv2   docker:////capd-rke2-test-worker-md-0-fx7n5-hmdv2   Running   20m     v1.27.3+rke2r1
worker-md-0-fx7n5-m7f7g              capd-rke2-test   capd-rke2-test-worker-md-0-fx7n5-m7f7g   docker:////capd-rke2-test-worker-md-0-fx7n5-m7f7g   Running   20m     v1.27.3+rke2r1

clusterctl describe cluster -n example capd-rke2-test
NAME                                                            READY  SEVERITY  REASON  SINCE  MESSAGE
Cluster/capd-rke2-test                                          True                     33s    
├─ClusterInfrastructure - DockerCluster/capd-rke2-test          True                     20m    
├─ControlPlane - RKE2ControlPlane/capd-rke2-test-control-plane  True                     33s    
│ └─3 Machines...                                               True                     4m55s  See capd-rke2-test-control-plane-ftt64, capd-rke2-test-control-plane-tshb5, ...
└─Workers                                                                                       
  └─MachineDeployment/worker-md-0                               True                     9m3s   
    └─2 Machines...                                             True                     15m    See worker-md-0-fx7n5-hmdv2, worker-md-0-fx7n5-m7f7g

[furkatgofurov7]

@yiannistri @Danil-Grigorev take a look, should be good now (tested it locally all works as before)