Fix extension registry link in README.md (#13583)
Fix extension registry link in README.md (#13583)


adobe/brackets,Wikunia/brackets,Wikunia/brackets,MarcelGerber/brackets,Wikunia/brackets,Wikunia/brackets,ficristo/brackets,sprintr/brackets,adobe/brackets,Wikunia/brackets,ficristo/brackets,ficristo/brackets,ficristo/brackets,sprintr/brackets,adobe/brackets,MarcelGerber/brackets,MarcelGerber/brackets,adobe/brackets,MarcelGerber/brackets,ficristo/brackets,sprintr/brackets,sprintr/brackets,adobe/brackets,sprintr/brackets,MarcelGerber/brackets