fix unkown command elxir with rtx and fish (#1019)

Whoops · web-flow · commit f5f62da932da · 2023-11-02T13:28:41.000+01:00
diff --git a/scripts/launch.fish b/scripts/launch.fish
@@ -26,7 +26,8 @@ else
   set rtx (which rtx)
   if test -n "$rtx"
     echo "rtx executable found in $rtx, activating" >&2
-    "$rtx" activate fish | source
+
+    "$rtx" env -s fish | source
   else
     echo "rtx not found" >&2
   end
