Add logo to README.md

[saschagrunert]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Adding the logo to the README.md

Which issue(s) this PR fixes:

Refers to #872

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

None

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: saschagrunert

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [saschagrunert]

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[codecov-commenter]

Codecov Report

Merging #1217 (15699b5) into main (32e2712) will increase coverage by 0.79%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1217      +/-   ##
==========================================
+ Coverage   33.59%   34.39%   +0.79%     
==========================================
  Files          13       13              
  Lines        1128     1128              
  Branches      390      390              
==========================================
+ Hits          379      388       +9     
+ Misses        492      482      -10     
- Partials      257      258       +1     

[haircommander]

/lgtm