fix: Updated twitter icon (#7772)

Signed-off-by: knqyf263 <[email protected]>
Co-authored-by: knqyf263 <[email protected]>

Author: sarthak-kumar-shailendra

mkdocs.yml

@@ -268,7 +268,7 @@ extra:
     provider: mike
     default: latest
   social:
-    - icon: fontawesome/brands/twitter
+    - icon: fontawesome/brands/x-twitter
       link: https://twitter.com/AquaTrivy
     - icon: fontawesome/brands/github
       link: https://github.com/aquasecurity/trivy