Update v3.md

Author: DavidMStraub

docs/install_setup/v3.md

@@ -1,6 +1,6 @@
 # Gramps 6.0 upgrade guide
 
-Gramps 6.0 is expected to be released at the end of February, 2025.
+Gramps 6.0 is expected to be released in March 2025.
 
 Gramps Web is **not yet compatible** with Gramps 6.0. If you are using Gramps Web and intend to [synchronize](../administration/sync.md) it with Gramps Desktop, please **do not upgrade to Gramps 6.0** until a new version of Gramps Web is released that is compatible with Gramps 6.0.