fix typo in git-ignore comment

Author: JeremySorensen

config.toml.example

@@ -260,7 +260,7 @@
 
 # Flag indicating whether git info will be retrieved from .git automatically.
 # Having the git information can cause a lot of rebuilds during development.
-# Note: If this attribute is not explicity set (e.g. it left commented out) it
+# Note: If this attribute is not explicity set (e.g. if left commented out) it
 # will default to true if channel = "dev", but will default to false otherwise.
 #ignore-git = true