add trailing new line to Jira schemas

Author: odacremolbap

docs/schemas/jira.custom.json

@@ -35,4 +35,4 @@
    "type": "object"
   }
  }
-}
+}

docs/schemas/jira.issue.get.json

@@ -52,4 +52,4 @@
    "type": "object"
   }
  }
-}
+}

docs/schemas/jira.issue.json

@@ -1274,4 +1274,4 @@
    "type": "object"
   }
  }
-}
+}