CORTX-33852: Fix codecy issues (Seagate#2056)

Problem:
Following Codacy warning are observed in md files
no-heading-content-indent
heading-style 

Solution:
Removed extra space in a header.
used atx closed formatting for headers.

Signed-off-by: Prasanna Kulkarni <[email protected]>

Author: Prasanna Dattatraya Kulkarni