fix(deps): update dependency tinymce to v5.10.8

Author: renovate[bot]

package.json

@@ -68,7 +68,7 @@
     "redux-devtools-extension": "^2.13.9",
     "redux-logger": "^3.0.6",
     "regenerator-runtime": "0.14.0",
-    "tinymce": "5.10.7"
+    "tinymce": "5.10.8"
   },
   "devDependencies": {
     "@edx/browserslist-config": "^1.1.1",