Bump isbot from 5.1.17 to 5.1.21

Bumps [isbot](https://github.com/omrilotan/isbot) from 5.1.17 to 5.1.21.
- [Changelog](https://github.com/omrilotan/isbot/blob/main/CHANGELOG.md)
- [Commits](omrilotan/isbot@v5.1.17...v5.1.21)

---
updated-dependencies:
- dependency-name: isbot
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -137,7 +137,7 @@
     "filesize": "^6.1.0",
     "http-proxy-middleware": "^2.0.7",
     "http-terminator": "^3.2.0",
-    "isbot": "^5.1.17",
+    "isbot": "^5.1.21",
     "js-cookie": "2.2.1",
     "js-yaml": "^4.1.0",
     "json5": "^2.2.3",