Update configuration-file.md (#319)

Minor spelling and syntax changes.

docs/docs/documentation/configuration-file.md

@@ -134,7 +134,7 @@ performance = "High"
 # Note: You can set different font families but Rio terminal
 # will always look for regular font bounds whene
 #
-# You can also set family on root to overwritte all fonts
+# You can also set family on root to overwrite all fonts
 # [fonts]
 #   family = "cascadiamono"
 #