Add doc comment saying when SKIP_YIELD_ON_VERSION was enabled by (#2825)

Author: eamsden

temporal-sdk/src/main/java/io/temporal/internal/common/SdkFlag.java

@@ -12,6 +12,8 @@ public enum SdkFlag {
   SKIP_YIELD_ON_DEFAULT_VERSION(1),
   /*
    * Changes behavior of GetVersion to never yield.
+   *
+   * Enabled: 1.34.0
    */
   SKIP_YIELD_ON_VERSION(2),
   /*