documentation: fix typo

Author: joshuaobrien

docs/rules/no-relative-packages.md

@@ -6,7 +6,7 @@
 
 Use this rule to prevent importing packages through relative paths.
 
-It's useful in Yarn/Lerna workspaces, were it's possible to import a sibling
+It's useful in Yarn/Lerna workspaces, where it's possible to import a sibling
 package using `../package` relative path, while direct `package` is the correct one.
 
 ## Examples