Bump clipboard from 2.0.6 to 2.0.8

Bumps [clipboard](https://github.com/zenorocha/clipboard.js) from 2.0.6 to 2.0.8.
- [Release notes](https://github.com/zenorocha/clipboard.js/releases)
- [Commits](zenorocha/clipboard.js@v2.0.6...v2.0.8)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "blueimp-md5": "^2.18.0",
     "bootstrap": "^4.6.0",
     "camelcase": "^6.2.0",
-    "clipboard": "^2.0.6",
+    "clipboard": "^2.0.8",
     "core-js": "^3.8.3",
     "css-vars-ponyfill": "^2.4.5",
     "davclient.js": "git+https://github.com/owncloud/davclient.js.git#0.2.1",