Issue 485: Documentation changes for operator upgrade

[anishakj]

Signed-off-by: anishakj [email protected]

Change log description

Added documentation changes in operator-upgrade.md

Purpose of the change

Fixes #485

What the code does

Document update

How to verify it

Document updated correctly

[Prabhaker24]

You can change this part in the pr description

How to verify it
(Steps to verify that the changes are effective)

[Prabhaker24]

LGTM

[codecov-io]

Codecov Report

Merging #486 (65e0ddb) into master (da3a020) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #486   +/-   ##
=======================================
  Coverage   72.37%   72.37%           
=======================================
  Files          15       15           
  Lines        3356     3356           
=======================================
  Hits         2429     2429           
  Misses        824      824           
  Partials      103      103           

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