Bug 1654459 - Default webgl.enable-surface-texture to true. r=snorp

This should match the previous behavior where non-parent processes
ignored the pref and used surface textures.

Differential Revision: https://phabricator.services.mozilla.com/D84476

modules/libpref/init/StaticPrefList.yaml

@@ -9785,7 +9785,7 @@
 
 - name: webgl.enable-surface-texture
   type: RelaxedAtomicBool
-  value: false
+  value: true
   mirror: always
 
 - name: webgl.enable-webgl2