docs: update example usage of project filtering with @commitlint/config-nx-scopes

Author: jaytavares

@commitlint/config-nx-scopes/readme.md

@@ -12,9 +12,11 @@ npm install --save-dev @commitlint/config-nx-scopes @commitlint/cli
 echo "module.exports = {extends: ['@commitlint/config-nx-scopes']};" > commitlint.config.js
 ```
 
-## Filtering projects by type
+## Filtering projects
 
-You can filter projects by type by specifying the project type parameter.
+You can filter projects by defining a filter function as the second parameter to the getProjects function. The function will be called with the each projects' `name`, `type`, and `tags`. You can return a boolean to indicate whether the project should be included or not.
+
+As an example, the following code demonstrates how to select only applications that are not end-to-end tests.
 
 In your .commitlintrc.js file:
 
@@ -28,9 +30,15 @@ module.exports = {
     'scope-enum': async (ctx) => [
       2,
       'always',
-      [...(await getProjects(ctx, 'application'))], // ⬅ or 'library'
+      [
+        ...(await getProjects(
+          ctx,
+          ({name, type}) => !name.includes('e2e') && type == 'application'
+        )),
+      ],
     ],
   },
+  // . . .
 };
 ```