Bug 1732082 - Enable layout.css.grid-item-baxis-measurement.enabled in all channels r=dholbert

Differential Revision: https://phabricator.services.mozilla.com/D140647

modules/libpref/init/StaticPrefList.yaml

@@ -7589,7 +7589,7 @@
 # Is support for caching an grid item's block axis measurement enabled?
 - name: layout.css.grid-item-baxis-measurement.enabled
   type: bool
-  value: @IS_EARLY_BETA_OR_EARLIER@
+  value: true
   mirror: always
 
 # Is support for CSS masonry layout enabled?