Merge pull request #320 from saiutkarsh33/setcrs-desc-ug

Setcrs desc ug

docs/UserGuide.md

@@ -360,6 +360,8 @@ Sets the course code in question.
 
 The course code is shown at the top of TAPro's main window.
 
+Course code must be in the format "XX1234Y", where Y is optional.
+
 <box type="definition" icon=":fa-solid-spell-check:" light>
 
 **Format: `setcrs COURSE_CODE`**
@@ -371,9 +373,15 @@ Course codes are case-insensitive.
 
 </box>
 
+<box type="info" light>
+
+Course codes must start with a prefix of 2 letters.
+
+</box>
+
 <box type="success" light>
 
-**Screenshots of using the `help` command:**
+**Screenshots of using the `setcrs` command:**
 
 <span class="semi-bold">#g#Before running `setcrs` command:##</span>