neo2: Fix layer 2 lock

[gifti258]

Presumably with the newest version, layer 2 lock required to press both shift keys for about at least 2 seconds.

[tekezo]

@gifti258
Thank you for the PR.
Upon checking the content, is this change is more appropriate?

@@ -231,16 +231,24 @@ function rules() {
         {
           type: 'basic',
           from: { key_code: 'left_shift', modifiers: { mandatory: ['right_shift'], optional: ['caps_lock'] } },
-          to: [{ key_code: 'caps_lock' }],
+          to: [
+            {
+              key_code: 'caps_lock',
+              hold_down_milliseconds: 200,
+            },
+            {
+              key_code: 'vk_none',
+            },
+          ],
           to_if_alone: [{ key_code: 'left_shift' }]
         },
         {