fix(nix): correct indentation in at-spi2-core overrideAttrs

- Adjusted the indentation in `at-spi2-core`'s `overrideAttrs` block for consistency.
- Improves readability and maintains uniform code style across the file.

overlays/mods/default.nix

@@ -5,10 +5,10 @@ final: prev: {
       ./gnome-console-Add-image-and-file-path-pasting-support-for.patch
     ];
   });
-        at-spi2-core = prev.at-spi2-core.overrideAttrs (oldAttrs: {
-          postInstall = (oldAttrs.postInstall or "") + ''
-            substituteInPlace $out/etc/xdg/Xwayland-session.d/00-at-spi \
-              --replace-fail 'exec xprop' 'exec ${final.xorg.xprop}/bin/xprop'
-          '';
-        });
+  at-spi2-core = prev.at-spi2-core.overrideAttrs (oldAttrs: {
+    postInstall = (oldAttrs.postInstall or "") + ''
+      substituteInPlace $out/etc/xdg/Xwayland-session.d/00-at-spi \
+        --replace-fail 'exec xprop' 'exec ${final.xorg.xprop}/bin/xprop'
+    '';
+  });
 }