Update handlebars dependency version constraint

Author: soumeh01

package.json

@@ -192,7 +192,7 @@
     "tar@^7.0.0": "^7.5.10",
     "immutable@<=4.3.8": "^4.3.8",
     "@tootallnate/once@<=3.0.1": "^3.0.1",
-    "handlebars": "4.7.9"
+    "handlebars@<=4.7.8": "^4.7.9"
   },
   "contributes": {
     "icons": {