Bump tinymce from 4.9.2 to 4.9.7 in /src/Umbraco.Web.UI.Client

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 4.9.2 to 4.9.7.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/4.9.7/changelog.txt)
- [Commits](https://github.com/tinymce/tinymce-dist/compare/4.9.2...4.9.7)

Signed-off-by: dependabot[bot] <support@github.com>

src/Umbraco.Web.UI.Client/package-lock.json

@@ -15313,9 +15313,9 @@
       "integrity": "sha512-NB6Dk1A9xgQPMoGqC5CVXn123gWyte215ONT5Pp5a0yt4nlEoO1ZWeCwpncaekPHXO60i47ihFnZPiRPjRMq4Q=="
     },
     "tinymce": {
-      "version": "4.9.2",
-      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-4.9.2.tgz",
-      "integrity": "sha512-ZRoTGG4GAsOI73QPSNkabO7nkoYw9H6cglRB44W2mMkxSiqxYi8WJlgkUphk0fDqo6ZD6r3E+NSP4UHxF2lySg=="
+      "version": "4.9.7",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-4.9.7.tgz",
+      "integrity": "sha512-cj0HvUuniTuIjOAJdRt5BUfeQqM5yHjbA2NOub9HUHXlCrT9OwD9WBPU6tGlaPC2l2I4eGoOnT8llosZRdQU5Q=="
     },
     "tmp": {
       "version": "0.0.33",

src/Umbraco.Web.UI.Client/package.json

@@ -42,7 +42,7 @@
     "npm": "6.13.6",
     "signalr": "2.4.0",
     "spectrum-colorpicker": "1.8.0",
-    "tinymce": "4.9.2",
+    "tinymce": "4.9.7",
     "typeahead.js": "0.11.1",
     "underscore": "1.9.1"
   },