Merge pull request #2325 from DavidLiedle/master

Update ch01-01-installation.md

Author: steveklabnik

src/ch01-01-installation.md

@@ -122,7 +122,7 @@ resources include [the Users forum][users] and [Stack Overflow][stackoverflow].
 
 [discord]: https://discord.gg/rust-lang
 [users]: https://users.rust-lang.org/
-[stackoverflow]: http://stackoverflow.com/questions/tagged/rust
+[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
 
 ### Local Documentation