Revise intake application status and add sign-up link

Updated application status for Semester 1 2026 intake and added a sign-up link for Semester 2 2026 updates.

Author: rowlandm

students.md

@@ -18,7 +18,13 @@ We have three intakes per year - Semester 1 (March to May), Semester 2 (August t
 
 ### List of student intern projects (subject to availability and eligibility)
 
-Please note that applications for the Summer 2025 / 2026 intake have now closed.
+Please note that applications for the Semester 1 2026 intake are now open.
+
+<a href="how-to-apply" 
+   style="color: white; background-color: #2372b9; margin: 0.5em; padding: 0.25em 1em; border-radius: 6px; box-shadow: 3px 3px 3px rgba(0,0,0,0.2); text-decoration: none; float: left; width: 30%; margin-left: 21%; margin-bottom: 24px; text-align: center;">
+   How to Apply
+</a>
+<div style="clear:both"></div>
 
 Here are some of the [recurring student intern projects and new projects we are working on](project-wikis).
 
@@ -121,6 +127,12 @@ Here is more information about the internship program:
 </a>
 <div style="clear:both"></div>
 
+<a href="https://forms.office.com/Pages/ResponsePage.aspx?id=4nJ8qs_FQEqiKqWFwEygfHucYnIbkjZJm7W73SM5JMBUN1lEOTNXWEI2WjI2OTRDV1E4MjlOSzNQNy4u" 
+   style="color: white; background-color: #2372b9; margin: 0.5em; padding: 0.25em 1em; border-radius: 6px; box-shadow: 3px 3px 3px rgba(0,0,0,0.2); text-decoration: none; float: left; width: 30%; margin-left: 21%; margin-bottom: 24px; text-align: center;">
+   Sign up for Semester 2 2026 updates
+</a>
+<div style="clear:both"></div>
+
 ## To make changes to this website
 
 Go to [the GitHub repo to change this website](https://github.com/WEHI-RCPStudentInternship/WEHI-RCPStudentInternship.github.io)