Bump bootstrap from 4.5.3 to 4.6.0

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 4.5.3 to 4.6.0.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](https://github.com/twbs/bootstrap/compare/v4.5.3...v4.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: npmbuildbot-nextcloud[bot] <npmbuildbot-nextcloud[bot]@users.noreply.github.com>

package-lock.json

@@ -3106,9 +3106,9 @@
       "dev": true
     },
     "bootstrap": {
-      "version": "4.5.3",
-      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.5.3.tgz",
-      "integrity": "sha512-o9ppKQioXGqhw8Z7mah6KdTYpNQY//tipnkxppWhPbiSWdD+1raYsnhwEZjkTHYbGee4cVQ0Rx65EhOY/HNLcQ=="
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.6.0.tgz",
+      "integrity": "sha512-Io55IuQY3kydzHtbGvQya3H+KorS/M9rSNyfCGCg9WZ4pyT/lCxIlpJgG1GXW/PswzC84Tr2fBYi+7+jFVQQBw=="
     },
     "brace-expansion": {
       "version": "1.1.11",

package.json

@@ -44,7 +44,7 @@
     "autosize": "^4.0.2",
     "backbone": "^1.4.0",
     "blueimp-md5": "^2.18.0",
-    "bootstrap": "^4.5.3",
+    "bootstrap": "^4.6.0",
     "camelcase": "^6.2.0",
     "clipboard": "^2.0.6",
     "core-js": "^3.8.2",