Merge branch 'hackathon-2023-update' into 'master'

Add import Hackathon imfornation at the top of the page

See merge request hifis/overall/hifis.net!704

_posts/2023/2023-01-20-helmholtz-gpu-hackathon.md

@@ -14,6 +14,10 @@ excerpt: >
    Join the 2023 _Helmholtz GPU Hackathon_ and give your research software project a performance boost with the help of experienced mentors.
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+{:.alert .alert-success}
+For application, more information & questions click [here](https://www.openhackathons.org/s/siteevent/a0C5e000007ZQ6lEAG/se000171).
+Deadline for the team application is **March 14, 2023**!
+
 ## What is a GPU Hackathon?
 
 GPU Hackathons provide exciting opportunities for scientists to accelerate their AI or HPC research under the guidance of expert mentors from national laboratories, universities and industry leaders in a collaborative environment.