Bump @wordpress/viewport from 2.25.6 to 2.25.8 (#6764)

Bumps [@wordpress/viewport](https://github.com/WordPress/gutenberg/tree/HEAD/packages/viewport) from 2.25.6 to 2.25.8.
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/changelog.txt)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/viewport@2.25.8/packages/viewport)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -53,7 +53,7 @@
     "@wordpress/data": "^4.26.0",
     "@wordpress/element": "^2.19.0",
     "@wordpress/i18n": "^3.17.0",
-    "@wordpress/viewport": "^2.25.6",
+    "@wordpress/viewport": "^2.25.8",
     "big.js": "^6.0.3",
     "classnames": "^2.2.6",
     "colorthief": "^2.3.2",