Added capabilities section information to CNI readme file

[ninzavivek]

What this PR does / why we need it:
Added capabilities section info to the CNI readme page.

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #
None.

Special notes for your reviewer:
Check grammar and typos.

Release note:

[codecov]

Codecov Report

Merging #328 into master will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #328      +/-   ##
==========================================
+ Coverage   45.08%   45.16%   +0.08%     
==========================================
  Files          25       25              
  Lines        3538     3538              
==========================================
+ Hits         1595     1598       +3     
+ Misses       1687     1685       -2     
+ Partials      256      255       -1

Impacted Files	Coverage Δ
telemetry/telemetrybuffer.go	51.98% <0%> (+1.08%)	⬆️

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