fix comment sentence

Co-authored-by: Cecile Robert-Michon <cerobert@microsoft.com>

.github/pull_request_template.md

@@ -1,6 +1,6 @@
  <!-- If this is your first PR, welcome! Please make sure you read the [contributing guidelines](../CONTRIBUTING.md). -->
 
- <!-- please add a icon to the title of this PR (see ../CONTRIBUTING.md), and delete this line and similar ones -->
+ <!-- please add an icon to the title of this PR (see ../CONTRIBUTING.md), and delete this line and similar ones -->
  <!-- the icon will be either ⚠️ (:warning:, major or breaking changes), ✨ (:sparkles:, feature additions), 🐛 (:bug:, patch and bugfixes), 📖 (:book:, documentation or proposals), 💚 (`:green_heart:`, testing), 💎 (`:gem:`, refactor), 🔧 (`:wrench:`, dev tooling and chores) or 🌱 (:seedling:, minor or other) -->
 
 **What this PR does / why we need it**:
@@ -26,4 +26,4 @@ _Please confirm that if this PR changes any image versions, then that's the sole
 -->
 ```release-note
 
-```
+```