Update CHANGELOG.rst [skip ci]

Author: BDonnot

CHANGELOG.rst

@@ -31,7 +31,7 @@ Change Log
 - [???] "asynch" multienv
 - [???] properly model interconnecting powerlines
 
-[1.10.1] - 2024-03-xx
+[1.10.1] - 2024-03-18
 ----------------------
 - [FIXED] issue https://github.com/rte-france/Grid2Op/issues/593
 - [FIXED] backward compatibility issues with "oldest" lightsim2grid versions