Fix logos

[goldfishdolphin]

Description

This PR fixes #7491 in meshery [Docs] Replace old Meshery logos

Notes for Reviewers

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[leecalcote]

Looks great, @goldfishdolphin 👏

[welcome]

Thanks for your contribution to the Layer5 community! 🎉

[vishalvivekm]

@goldfishdolphin would you mind sharing how the Readme.md looks like after your changes were merged
for me I see the logos to be broken:

[goldfishdolphin]

@vishalvivekm that is very strange as it is locally it is like this.

[vishalvivekm]

Sorry, due to some internet issues, the logos in the readme weren't being rendered, it's working well now, here's how it looks like after your changes

Here's some feedback :

1. there's too much spacing between the first logo and the header "Meshery Adapter for NGINX Service Mesh"
2. the second meshery logo, the size is quite not what it should be: isn't it so small? and the margins around it: much spacing
   

@goldfishdolphin

[goldfishdolphin]

@vishalvivekm I agree with you. But it is still not appearing on browser as on vs code. Apparently img tag is not rendering dark/light mode images that I replaced.