chore: set the WordPress tested up to version to 7.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: enricobattocchi

readme.txt

@@ -2,7 +2,7 @@
 Contributors: yoast, angrycreative, kraftner, marcusforsberg, viktorfroberg, joostdevalk, atimmer, jipmoors, theorboman
 Tags: Yoast, SEO, ACF, Advanced Custom Fields, analysis, Search Engine Optimization
 Requires at least: 6.8
-Tested up to: 6.9
+Tested up to: 7.0
 License: GPLv3
 License URI: http://www.gnu.org/licenses/gpl.html
 Stable tag: 3.2