Update some links in existing pages

Author: emiliom

about/pasthackweeks.md

@@ -15,7 +15,7 @@ OceanHackWeek started out as an in-person event in Seattle with limited virtual
 
 - A hybrid event with a global virtual event, several in-person "satellite" events, and satellites in Spanish and Portuguese.
 - Programming languages: Python + R
-- [Web site](https://oceanhackweek.org/ohw22/)
+- [Web site](../ohw22/index)
 - **Additional details will be added soon.**
 
 

index.md

@@ -158,6 +158,6 @@ Virtual event: We expect to hold formal sessions in at least two time zones, USA
 
 about/index.md
 about/pasthackweeks.md
-OceanHackWeek 2022 <ohw22/index.md>
+OceanHackWeek 2023 <ohw23/index.md>
 % posts
 ```