chore: Added warning header for old schedule on summer 2025 (#220)

Author: Gurpranked

docs/schedule/2025Summer/2025Summer.mdx

@@ -7,6 +7,11 @@ ogTitle: Meeting Schedule for Summer 2025
 ogDescription: Explore the Summer 2025 meeting schedule for the UMass Lowell Cloud Computing Club. Join us for virtual meetings every Saturday. We'll discuss the latest cloud computing trends, explore cutting-edge technologies, and collaborate on innovative projects.
 ---
 
+:::danger
+This schedule is outdated and refers to a past semester. Please check the [latest schedule](../docs/current-schedule) for current information.
+:::
+
+
 <center>
     <a style={{padding: 4}} href="https://discord.gg/TZuMgMsC8X">
         <img style={{ borderRadius: "8px" }} src="https://img.shields.io/discord/890983857938116729?logo=discord&logoColor=white&style=for-the-badge" alt="Join our Discord community"/>