refactor(no-container): update error message

and incorrect use case

Author: thebinaryfelix

docs/rules/no-container.md

@@ -22,7 +22,7 @@ const button = alias.querySelector('.btn-primary');
 
 ```js
 const view = render(<Example />);
-const button = view.container.querySelector('.btn-primary');
+const button = view.container.getElementsByClassName('.btn-primary');
 ```
 
 Examples of **correct** code for this rule:

lib/rules/no-container.ts

@@ -21,7 +21,7 @@ export default ESLintUtils.RuleCreator(getDocsUrl)({
     },
     messages: {
       noContainer:
-        'Avoid using container to query for elements. Prefer using query methods from Testing Library, such as "getByRole()"',
+        'Avoid using container methods. Prefer using the methods from Testing Library, such as "getByRole()"',
     },
     fixable: null,
     schema: [