test(config): lower pixel diff threshold to 0.02 (#26010)

core/playwright.config.ts

@@ -91,7 +91,7 @@ const config: PlaywrightTestConfig = {
        * Increases the maximum allowed pixel difference to account
        * for slight browser rendering inconsistencies.
        */
-      maxDiffPixelRatio: 0.03
+      maxDiffPixelRatio: 0.02
     }
   },
   /* Fail the build on CI if you accidentally left test.only in the source code. */