Revert "Fix example config"

This reverts commit 6ab0b55.

README.md

@@ -25,7 +25,7 @@ Example:
 ```toml
 dirs = ["Cider/", "CiderPlaybackAgent/"]
 
-[[path_aliases]]
+[path_aliases]
 # "@" as a path alias refers to the current working directory in most cases
 "@" = "./"
 ```