Update Alibi_Explain_Logo_rgb image with white stroked letters

[LakshmanKishore]

This pull request addresses the visibility issue of the Alibi Explain image in the README when using the default dark theme on GitHub. It adds a white stroke to the letters, improving their clarity against the dark background.

After the changes - README.md

[codecov]

Codecov Report

Merging #979 (08ae5e5) into master (8c22049) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #979   +/-   ##
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  Coverage   85.23%   85.23%           
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  Files          74       74           
  Lines        8834     8834           
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  Hits         7530     7530           
  Misses       1304     1304           

[jklaise]

Thank you for your contribution!

[LakshmanKishore]

Hi @jklaise ,

I hope you're doing well. I wanted to express my gratitude for merging this pull request. I noticed that the 'hacktoberfest-accepted' label hasn't been added to it yet.

Hacktoberfest is important to many contributors, including myself, and this label helps participants track their contributions. If it's not too much trouble, could you kindly add the 'hacktoberfest-accepted' label to this merged pull request? This would be greatly appreciated.

Thank you once again for your support, and I look forward to contributing more to this project in the future.

[LakshmanKishore]

Thank you so much for promptly adding the 'hacktoberfest-accepted' label to my pull request.
I look forward to more collaborations in the future.
Thank you!