docs: Fix sentence in Machine-files.md [skip ci]

Fixes: 1ca17dc853 ("docs/machine-files: Add a section on data types")

docs/markdown/Machine-files.md

@@ -34,7 +34,7 @@ A boolean must be either `true` or `false`, and unquoted.
 option = false
 ```
 
-An integer must be either an unquoted numeric constant;
+An integer must be an unquoted numeric constant.
 ```ini
 option = 42
 ```