Remove trailing slashes from my domain links

I no longer include them so this saves a redirect.

README.md

@@ -403,7 +403,7 @@ I'm a self taught developer and have been freelancing for the last ~20 years.
 You can read about everything I've learned along the way on my site at
 [https://nickjanetakis.com](https://nickjanetakis.com/).
 
-There's hundreds of [blog posts](https://nickjanetakis.com/blog/) and a couple
-of [video courses](https://nickjanetakis.com/courses/) on web development and
+There's hundreds of [blog posts](https://nickjanetakis.com/blog) and a couple
+of [video courses](https://nickjanetakis.com/courses) on web development and
 deployment topics. I also have a [podcast](https://runninginproduction.com)
 where I talk with folks about running web apps in production.