Update .app files (#2832)

Co-authored-by: GitHub Actions <github-actions[bot]@users.noreply.github.com>

Author: community-scripts-pr-app[bot]

ct/headers/revealjs

@@ -0,0 +1,6 @@
+    ____                       __    _______
+   / __ \___ _   _____  ____ _/ /   / / ___/
+  / /_/ / _ \ | / / _ \/ __ `/ /_  / /\__ \ 
+ / _, _/  __/ |/ /  __/ /_/ / / /_/ /___/ / 
+/_/ |_|\___/|___/\___/\__,_/_/\____//____/  
+