fix: submit form

Signed-off-by: Vadim <vadim@holdex.io>

Author: zolotokrylin

.github/ISSUE_TEMPLATE/leave_request.yml

@@ -24,7 +24,7 @@ body:
     attributes:
       label: Start Date (inclusive)
       description: First day you will be off (YYYY-MM-DD)
-      placeholder: 2025-07-15
+      placeholder: "2025-07-15"
     validations:
       required: true
 
@@ -33,7 +33,7 @@ body:
     attributes:
       label: End Date (inclusive)
       description: Last day you will be off (YYYY-MM-DD)
-      placeholder: 2025-07-23
+      placeholder: "2025-07-23"
     validations:
       required: true