Update src/content/guides/workspaces.md

Co-authored-by: Marya <111139605+MaryaBelanger@users.noreply.github.com>

src/content/guides/workspaces.md

@@ -134,7 +134,7 @@ including any workspace package.
 ```
 
 If any directory between the workspace root and a workspace package contains a
-"stray" `pubspec.yaml` file that is not member of the workspace, `pub get` will
+"stray" `pubspec.yaml` file that is not a member of the workspace, `pub get` will
 report an error and fail to resolve, as resolving such a `pubspec.yaml` would
 create a `.dart_tool/package_config.json` file that shadows the one at the root.