fix: remove trailing punctuation from welcome heading (MD026) (#1720)

* Initial plan

* fix: remove trailing exclamation from heading in 00-welcome.md (MD026)

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

workshop/00-welcome.md

@@ -2,7 +2,7 @@
 <!-- page-adventure: core -->
 <!-- learning: false -->
 
-# Welcome to our Agent Factory Tour!
+# Welcome to our Agent Factory Tour
 
 By the end of this workshop, a real AI agent will create an issue with a summary of the activity in your repository over the latest 24h, every day, without you writing shell-script workflow code.