docs(website): update SUMMARY.md for SP25

Author: umanachi

src/SUMMARY.md

@@ -28,6 +28,15 @@
   - [Lab 7: Becoming a Processor Designer](getting_started/onboarding/08_paths.md)
   - [Lab 8+: Advanced Processor Design](getting_started/onboarding/09_cpu2.md)
 # Design Notebooks
+- [Spring 2025](design_notebooks/2025spring/00_toc.md)
+  - [Darren Kuo](design_notebooks/2025spring/dk4461.md)
+  - [Rielle Lim](design_notebooks/2025spring/gil2011.md)
+  - [Hongtai Du](design_notebooks/2025spring/hd2609.md)
+  - [James Xie](design_notebooks/2025spring/hx2227.md)
+  - [Noah Mays-Smith](design_notebooks/2025spring/nm4207.md)
+  - [Uma Nachiappan](design_notebooks/2025spring/un2021.md)
+  - [Xingzhi Dai](design_notebooks/2025spring/xd2305.md)
+  - [Ben Feng](design_notebooks/2025spring/zf2179.md)
 - [Fall 2024](design_notebooks/2024fall/00_toc.md)
   - [Anu Tadapaneni](design_notebooks/2024fall/at4881.md)
   - [Cameron Bedard](design_notebooks/2024fall/cb5179.md)