Fix logo alignment and update HTML tags in README

[jkroepke]

Updated logo alignment and HTML structure in README.

What this PR does / why we need it

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

• fixes #

Special notes for your reviewer

Particularly user-facing changes

Checklist

Complete these before marking the PR as ready to review:

• DCO signed
• The PR title has a summary of the changes
• The PR body has a summary to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.77%. Comparing base (6f31c3f) to head (0023616).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #715      +/-   ##
==========================================
+ Coverage   84.71%   84.77%   +0.05%     
==========================================
  Files          58       58              
  Lines        3442     3442              
==========================================
+ Hits         2916     2918       +2     
+ Misses        366      365       -1     
+ Partials      160      159       -1     

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