README: correcting affiliate link

Author: getify

README.md

@@ -44,9 +44,9 @@ But **PLEASE** read the [Contributions Guidelines](CONTRIBUTING.md) carefully be
 
 ## Thank You To These Wonderful Sponsors
 
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+[![Doppler Logo (dark)](https://github.com/getify/You-Dont-Know-JS/blob/2nd-ed/external-logos/doppler_logo-light.svg)](https://www.doppler.com/?utm_campaign=getify&utm_medium=referral&utm_content=awesomeforbeginners&utm_source=github#gh-light-mode-only)
 
-[![Doppler Logo(light)](https://github.com/getify/You-Dont-Know-JS/blob/2nd-ed/external-logos/doppler_logo.svg)](https://www.doppler.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=awesomeforbeginners&utm_source=github#gh-dark-mode-only)
+[![Doppler Logo(light)](https://github.com/getify/You-Dont-Know-JS/blob/2nd-ed/external-logos/doppler_logo.svg)](https://www.doppler.com/?utm_campaign=getify&utm_medium=referral&utm_content=awesomeforbeginners&utm_source=github#gh-dark-mode-only)
 
 <a href="https://www.doppler.com/?utm_campaign=github_repo&utm_medium=referral&utm_content=awesomeforbeginners&utm_source=github">**All your environment variables, in one place**</a>