Fix typo in size-* tests (#12289)

* Update size.test.js

* Fix test

---------

Co-authored-by: Jordan Pittman <[email protected]>

Author: AhmedBaset

tests/plugins/__snapshots__/size.test.js.snap

@@ -302,6 +302,16 @@ exports[`should test the 'size' plugin 1`] = `
   height: 24rem;
 }
 
+.size-\\[12px\\] {
+  width: 12px;
+  height: 12px;
+}
+
+.size-\\[var\\(--my-value\\)\\] {
+  width: var(--my-value);
+  height: var(--my-value);
+}
+
 .size-auto {
   width: auto;
   height: auto;

tests/plugins/size.test.js

@@ -3,7 +3,7 @@ import { quickPluginTest } from '../util/run'
 quickPluginTest('size', {
   safelist: [
     // Arbitrary values
-    's-[12px]',
-    's-[var(--my-value)]',
+    'size-[12px]',
+    'size-[var(--my-value)]',
   ],
 }).toMatchSnapshot()