release-1.1 deployment instructions is pointing to wrong links

[fidencio]

Description

https://github.com/openshift/sandboxed-containers-operator/tree/release-1.1#without-a-git-repo-checkout points to a non-existent file.

The document mentions:

To deploy the operator and create a custom resource (which installs Kata on all worker nodes), run curl https://raw.githubusercontent.com/openshift/sandboxed-containers-operator/master/deploy/install.sh | bash

However, https://raw.githubusercontent.com/openshift/sandboxed-containers-operator/master/deploy/install.sh is a non-existent file.
Most likely it should point to https://raw.githubusercontent.com/openshift/sandboxed-containers-operator/release-1.1/deploy/install.sh

Steps to reproduce the issue:

1. Open your web browser
2. Go to https://github.com/openshift/sandboxed-containers-operator/tree/release-1.1#without-a-git-repo-checkout
3. Try to follow the instructions provided

Describe the results you received:

[fidencio@kundera ocp]$ curl https://raw.githubusercontent.com/openshift/sandboxed-containers-operator/master/deploy/install.sh | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    14  100    14    0     0     57      0 --:--:-- --:--:-- --:--:--    57
bash: line 1: 404:: command not found

Describe the results you expected:

The deployment would start.

Additional information you deem important (e.g. issue happens only occasionally):

Not relevant

Output of oc describe kataconfig <your-kataconfig>:

Not relevant

Additional environment details (platform, options, etc.):

Not relevant

[fidencio]

Note that the script itself also has to be updated to point to the release branch.

[bpradipt]

Fixed via #160