Closes gh-95133: docs, fix indentation level in TestCase.assertLogs example (GH-95134)

(cherry picked from commit 2a9c227a)

Co-authored-by: Alexandru Mărășteanu <alexei@users.noreply.github.com>

Doc/library/unittest.rst

@@ -1150,8 +1150,8 @@ Test cases
       Example::
 
          with self.assertLogs('foo', level='INFO') as cm:
-            logging.getLogger('foo').info('first message')
-            logging.getLogger('foo.bar').error('second message')
+             logging.getLogger('foo').info('first message')
+             logging.getLogger('foo.bar').error('second message')
          self.assertEqual(cm.output, ['INFO:foo:first message',
                                       'ERROR:foo.bar:second message'])