Documentation Typo: "Install blobfuse driver on a kubernetes cluster" for 1.7 and 1.8

[GuyPaddock]

What happened:
The documentation for the command to use on Kubernetes 1.7 and 1.8 has a typo.

What you expected to happen:
The command provided for 1.7 & 1.8 should work.

How to reproduce it:
Review the steps under "for version v1.8 & v1.7" in https://github.com/Azure/kubernetes-volume-drivers/blob/master/flexvolume/blobfuse/README.md#2-install-blobfuse-driver-on-every-agent-vm.

Anything else we need to know?:

• This command:

  kubectl apply -f https://raw.githubusercontent.com/Azure/kubernetes-volume-drivers/master/flexvolume/blobfuse/deployment/blobfuse-> flexvol-installer-1.8.yaml
  

  should probably be:

  kubectl apply -f https://raw.githubusercontent.com/Azure/kubernetes-volume-drivers/master/flexvolume/blobfuse/deployment/blobfuse-flexvol-installer-1.8.yaml
  

• The formatting for the "for version v1.8 & v1.7" section should also be fixed to be consistent with the formatting of the section for 1.9.

[andyzhangx]

thanks, I have corrected the typo

[GuyPaddock]

@andyzhangx what about my second bullet point?

• The formatting for the "for version v1.8 & v1.7" section should also be fixed to be consistent with the formatting of the section for 1.9.

Sorry; I know that's kind of a separate issue that I sneaked in. 😅

[andyzhangx]

I set the format "for version v1.8 & v1.7" section like that mainly because 1.7 & 1.8 are deprecated in AKS version now:

az aks get-versions --location eastus2 -o table
KubernetesVersion    Upgrades
-------------------  ------------------------
1.12.7               None available
1.12.6               1.12.7
1.11.9               1.12.6, 1.12.7
1.11.8               1.11.9, 1.12.6, 1.12.7
1.10.13              1.11.8, 1.11.9
1.10.12              1.10.13, 1.11.8, 1.11.9
1.9.11               1.10.12, 1.10.13
1.9.10               1.9.11, 1.10.12, 1.10.13