home: git: use 'mkAfter' for local config include

This should ensure that it will be included at the very end of the
configuration, allowing it to override any other options in the file.

Not sure that I _really_ need it, but it's tidier this way.

modules/home/git/default.nix

@@ -162,30 +162,34 @@ in
       };
     };
 
-    includes = [
+    includes = lib.mkMerge [
       # Multiple identities
-      {
-        condition = "gitdir:~/git/EPITA/";
-        contents = {
-          user = {
-            name = "Bruno BELANYI";
-            email = mkMailAddress "bruno.belanyi" "epita.fr";
+      [
+        {
+          condition = "gitdir:~/git/EPITA/";
+          contents = {
+            user = {
+              name = "Bruno BELANYI";
+              email = mkMailAddress "bruno.belanyi" "epita.fr";
+            };
           };
-        };
-      }
-      {
-        condition = "gitdir:~/git/work/";
-        contents = {
-          user = {
-            name = "Bruno BELANYI";
-            email = mkMailAddress "ambroisie" "google.com";
+        }
+        {
+          condition = "gitdir:~/git/work/";
+          contents = {
+            user = {
+              name = "Bruno BELANYI";
+              email = mkMailAddress "ambroisie" "google.com";
+            };
           };
-        };
-      }
+        }
+      ]
       # Local configuration, not-versioned
-      {
-        path = "config.local";
-      }
+      (lib.mkAfter [
+        {
+          path = "config.local";
+        }
+      ])
     ];
 
     ignores =