chore(deps): bump datatables.net-keytable-bs4 from 2.7.0 to 2.8.1 (#4922)

Bumps [datatables.net-keytable-bs4](https://github.com/DataTables/Dist-DataTables-KeyTable-Bootstrap4) from 2.7.0 to 2.8.1.
- [Release notes](https://github.com/DataTables/Dist-DataTables-KeyTable-Bootstrap4/releases)
- [Commits](https://github.com/DataTables/Dist-DataTables-KeyTable-Bootstrap4/compare/2.7.0...2.8.1)

---
updated-dependencies:
- dependency-name: datatables.net-keytable-bs4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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package.json

@@ -83,7 +83,7 @@
     "datatables.net-colreorder-bs4": "^1.5.6",
     "datatables.net-fixedcolumns-bs4": "^4.1.0",
     "datatables.net-fixedheader-bs4": "^3.2.4",
-    "datatables.net-keytable-bs4": "^2.7.0",
+    "datatables.net-keytable-bs4": "^2.8.1",
     "datatables.net-responsive-bs4": "^2.3.0",
     "datatables.net-rowgroup-bs4": "^1.2.0",
     "datatables.net-rowreorder-bs4": "^1.2.8",