Update citation

Author: sunray1

docs/past_help_desks/agu_2025.md

@@ -98,11 +98,20 @@ has_toc: false
 
 Preferred citation:
 
-> 
+> Earth Science Information Partners, & American Geophysical Union. (2025). Data Help Desk @ AGU 2025. American Geophysical Union 2025 (AGU 2025), New Orleans, Louisiana, USA. Zenodo. https://doi.org/10.5281/zenodo.18089255
 
 **BibTeX:**
 ```
-
+@misc{DHD_AGU2025,
+  author       = {Earth Science Information Partners and American Geophysical Union},
+  title        = {Data Help Desk @ AGU 2025},
+  howpublished = {American Geophysical Union 2025 (AGU 2025), New Orleans, Louisiana, USA},
+  year         = {2025},
+  publisher    = {Zenodo},
+  doi          = {10.5281/zenodo.18089255},
+  url          = {https://doi.org/10.5281/zenodo.18089255},
+  note         = {Event landing page and materials}
+}
 ```
 
 <img class="full-width-img" src="{{ site.baseurl }}/assets/photos/agu-2025/footer_agu2025_helpdesk.jpg" alt="Data Help Desk booth at AGU Connects 2025">