Update gsoc_ideas.mdx

fix typos, add link to setting started discussion

Author: dlebauer

src/pages/gsoc_ideas.mdx

@@ -4,7 +4,7 @@ title: 'GSoC 2025 - PEcAn Project Ideas'
 
 # GSoC - PEcAn Project Ideas{#background}
 
-PEcAn is an open-source ecosystem modeling framework integrating data, models, and uncertainty quantification. Below is a list of potential ideas where contributors can help improve and expand PEcAn. Come find us on Slack to discuss. If you have questions or would like to propose your own idea, contact @kooper in Slack or join our **[gsoc-2025](https://pecanproject.slack.com/archives/C0853U6GF71)**
+PEcAn is an open-source ecosystem modeling framework integrating data, models, and uncertainty quantification. Below is a list of potential ideas where contributors can help improve and expand PEcAn. To get started contributing to PEcAn, check out [this guide](https://github.com/PecanProject/pecan/discussions/3469). Come find us on Slack to discuss. If you have questions or would like to propose your own idea, contact @kooper in or join our **[#gsoc-2025](https://pecanproject.slack.com/archives/C0853U6GF71)** channel in Slack!
 
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