README: Use smaller award image
README: Use smaller award image

It's too big in relation to the rest.

Closes https://github.com/coala/coala/issues/4082

rimacone/testing2,RJ722/coala,nemaniarjun/coala,MariosPanag/coala,coala-analyzer/coala,coala/coala,shreyans800755/coala,Balaji2198/coala,aptrishu/coala,Balaji2198/coala,incorrectusername/coala,coala/coala,arjunsinghy96/coala,yashLadha/coala,arjunsinghy96/coala,coala-analyzer/coala,CruiseDevice/coala,shreyans800755/coala,yashLadha/coala,jayvdb/coala,netman92/coala,damngamerz/coala,jayvdb/coala,yashLadha/coala,rimacone/testing2,Asnelchristian/coala,aptrishu/coala,Shade5/coala,netman92/coala,arjunsinghy96/coala,refeed/coala,karansingh1559/coala,MariosPanag/coala,Shade5/coala,Balaji2198/coala,jayvdb/coala,Nosferatul/coala,Asalle/coala,RJ722/coala,SanketDG/coala,netman92/coala,Asnelchristian/coala,incorrectusername/coala,SanketDG/coala,karansingh1559/coala,shreyans800755/coala,Asalle/coala,karansingh1559/coala,Asalle/coala,refeed/coala,Asnelchristian/coala,coala/coala,Shade5/coala,kartikeys98/coala,damngamerz/coala,rimacone/testing2,Nosferatul/coala,damngamerz/coala,JohnS-01/coala,Nosferatul/coala,CruiseDevice/coala,kartikeys98/coala,RJ722/coala,MariosPanag/coala,SanketDG/coala,JohnS-01/coala,nemaniarjun/coala,nemaniarjun/coala,refeed/coala,CruiseDevice/coala,kartikeys98/coala,coala-analyzer/coala,incorrectusername/coala,JohnS-01/coala,aptrishu/coala