test: update playwright threshold to 0.1 (#27423)

Issue number: N/A

---------

<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->

<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

The team has observed that Playwright's default screenshot diff
threshold of 0.2 is not sensitive enough, and screenshots that should be
getting updated are not getting updated.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- Updates the threshold to 0.1

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

---------

Co-authored-by: ionitron <hi@ionicframework.com>

core/playwright.config.ts

@@ -52,7 +52,13 @@ const config: PlaywrightTestConfig = {
      * Maximum time expect() should wait for the condition to be met.
      * For example in `await expect(locator).toHaveText();`
      */
-    timeout: 5000
+    timeout: 5000,
+    toHaveScreenshot: {
+      threshold: 0.1
+    },
+    toMatchSnapshot: {
+      threshold: 0.1
+    }
   },
   /* Fail the build on CI if you accidentally left test.only in the source code. */
   forbidOnly: !!process.env.CI,