Update Readme

[arnab031]

Tagged GSSOC site is not working
Linked site is not working and Image is not showing properly in README.md
To Reproduce
Steps to reproduce the behavior:

1. Go to 'AmbSQL github page'
2. Click on 'README.md'
3. Scroll down to 'https://github.com/ambujraj/AmbSQL/blob/master/README.md#important-notice'
4. See error

Expected behavior
GSSOC site should be opened when we click on it.

[Tushar1337]

can you assign this to me? as I'm a gssoc '21 participant

[PragatiBhat]

can you assign this to me? as I'm a GSSOC '21 participant

[harmankaler2000]

@arnab031 I am a GSSoC'21 participant, I have already cloned the project and would love to work on this issue. Kindly assign the issue to me.

[KajalSinghBAGHEL]

I am GSSOC 21 participant I am a beginner and would like to work on this issue and learn new things, please assign me.