fix jest test errors

app/soapbox/features/auth_login/components/__tests__/__snapshots__/login_page-test.js.snap

@@ -2,7 +2,7 @@
 
 exports[`<LoginPage /> renders correctly on load 1`] = `
 <form
-  className="simple_form new_user" method='post'
+  className="simple_form new_user" method="post"
   onSubmit={[Function]}
 >
   <fieldset

app/soapbox/features/forms/__tests__/__snapshots__/forms-test.js.snap

@@ -77,8 +77,7 @@ exports[`<SelectDropdown /> renders correctly 1`] = `
 exports[`<SimpleForm /> renders correctly 1`] = `
 <form
   acceptCharset="UTF-8"
-  className="simple_form"
-  method='post'
+  className="simple_form" method="post"
   onSubmit={[Function]}
 />
 `;