schema BUGFIX correct yang-version value for 1.0

Instead of "1.0", the correct value is just "1".
diff --git a/src/tree_schema.h b/src/tree_schema.h
index 75cbfca..d94bf24 100644
--- a/src/tree_schema.h
+++ b/src/tree_schema.h
@@ -1027,7 +1027,7 @@
  */
 typedef enum LYS_VERSION {
     LYS_VERSION_UNDEF = 0,  /**< no specific version, YANG 1.0 as default */
-    LYS_VERSION_1_0 = 1,    /**< YANG 1.0 */
+    LYS_VERSION_1_0 = 1,    /**< YANG 1 (1.0) */
     LYS_VERSION_1_1 = 2     /**< YANG 1.1 */
 } LYS_VERSION;