Bump bootswatch from 4.5.2 to 4.6.0 (#1690)

Bumps [bootswatch](https://github.com/thomaspark/bootswatch) from 4.5.2 to 4.6.0.
- [Release notes](https://github.com/thomaspark/bootswatch/releases)
- [Commits](thomaspark/bootswatch@v4.5.2...v4.6.0)

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

package.json

@@ -53,7 +53,7 @@
     "bootlint": "1.1.0",
     "bootstrap": "npm:bootstrap@4.5.2",
     "bootstrap5": "npm:bootstrap@5.0.0-alpha2",
-    "bootswatch": "4.5.2",
+    "bootswatch": "4.6.0",
     "c8": "^7.6.0",
     "escape-string-regexp": "^4.0.0",
     "fs-extra": "^9.1.0",