fix: update openclaw FOD hash for latest npm release

Author: zach-source

agents/lib/mkAgent.nix

@@ -58,7 +58,7 @@ let
     # npm needs network access
     outputHashAlgo = "sha256";
     outputHashMode = "recursive";
-    outputHash = "sha256-eMobky1DPekWCaKiHqNfAu7Ezi2fArm7+SBFr3DoKb0=";
+    outputHash = "sha256-axCeUyP5rrVmhxkY/lW4TH7X69mBud8WzpVYOIAL460=";
   };
 
   # Config files baked into the image at /etc/openclaw (read-only)