Reverts mocha dependency to fix unit tests

Author: eamodio

package.json

@@ -19643,7 +19643,7 @@
 		"license-checker-rseidelsohn": "4.4.2",
 		"lz-string": "1.5.0",
 		"mini-css-extract-plugin": "2.9.2",
-		"mocha": "11.0.1",
+		"mocha": "10.8.2",
 		"ovsx": "0.10.1",
 		"playwright": "1.49.0",
 		"prettier": "3.1.0",