Update README.md [[Docs] readme: support light and dark mode image versions of Meshery logo]

[Rajdeep1311]

Description

This PR fixes #511

Notes for Reviewers
Thanks, Please review my PR and suggest if any changes needed

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[leecalcote]

Thanks. Changes needed:

1. don't reference your own repo
2. use the raw.githubusercontent.com references
3. use image references that are of this repo (images must be in this repo).

[Rajdeep1311]

Thanks. Changes needed:

1. don't reference your own repo
2. use the raw.githubusercontent.com references
3. use image references that are of this repo (images must be in this repo).

Okay sir... On it

[Rajdeep1311]

@leecalcote sir can you tell me how to use or learn more about raw.githubusercontent.com

[Ghat0tkach]

@Rajdeep1311 , this isnt a valid issue . You may close this PR

[Ghat0tkach]

closing this as it isnt a valid issue , Thanks for you contribution @Rajdeep1311 . There are plenty of other issues , you may contribute there as well🙌

[Rajdeep1311]

Sure