Bump WordPress "tested up to

Author: jeffpaul

readme.txt

@@ -2,7 +2,7 @@
 Contributors:      10up, helen, welcher, fabiankaegy, dinhtungdu, jeffpaul
 Tags:              apple maps, map block, block
 Requires at least: 5.8
-Tested up to:      6.2
+Tested up to:      6.3
 Requires PHP:      7.4
 Stable tag:        1.1.1
 License:           GPLv2 or later