Bump tinymce from 6.4.2 to 6.8.1 (#4210)

Bumps [tinymce](https://github.com/tinymce/tinymce/tree/HEAD/modules/tinymce) from 6.4.2 to 6.8.1.
- [Changelog](https://github.com/tinymce/tinymce/blob/develop/modules/tinymce/CHANGELOG.md)
- [Commits](https://github.com/tinymce/tinymce/commits/6.8.1/modules/tinymce)

---
updated-dependencies:
- dependency-name: tinymce
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

         "select2": "4.0.13",
         "select2-bootstrap-theme": "0.1.0-beta.10",
         "tempusdominus-bootstrap-4": "^5.39.2",
-        "tinymce": "^6.4.2"
+        "tinymce": "^6.8.1"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
       }
     },
     "node_modules/tinymce": {
-      "version": "6.4.2",
-      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-6.4.2.tgz",
-      "integrity": "sha512-te+4c8PoAwTKPMBQtMQehnSZlOO9Ay5tDgaRFJKBehYb6SlX2PYZ0v3oe/cmiv5EfqdwZLkEMXk2MNOeApZZLg==",
+      "version": "6.8.1",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-6.8.1.tgz",
+      "integrity": "sha512-WYPvMXIjBrXM/oBiqGCbT2a8ptiO3TWXm/xxPWDCl8SxRKMW7Rfp0Lk190E9fXmX6uh9lJMRCnmKHzvryz0ftA==",
       "dev": true
     },
     "node_modules/to-absolute-glob": {
       }
     },
     "tinymce": {
-      "version": "6.4.2",
-      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-6.4.2.tgz",
-      "integrity": "sha512-te+4c8PoAwTKPMBQtMQehnSZlOO9Ay5tDgaRFJKBehYb6SlX2PYZ0v3oe/cmiv5EfqdwZLkEMXk2MNOeApZZLg==",
+      "version": "6.8.1",
+      "resolved": "https://registry.npmjs.org/tinymce/-/tinymce-6.8.1.tgz",
+      "integrity": "sha512-WYPvMXIjBrXM/oBiqGCbT2a8ptiO3TWXm/xxPWDCl8SxRKMW7Rfp0Lk190E9fXmX6uh9lJMRCnmKHzvryz0ftA==",
       "dev": true
     },
     "to-absolute-glob": {

package.json

     "select2": "4.0.13",
     "select2-bootstrap-theme": "0.1.0-beta.10",
     "tempusdominus-bootstrap-4": "^5.39.2",
-    "tinymce": "^6.4.2",
+    "tinymce": "^6.8.1",
     "@tinymce/tinymce-jquery": "^2.1.0"
   },
   "scripts": {