message: Update hugectr_embedding_training_cache.md
diff: @@ -282,7 +282,7 @@ Fig. 5: Bandwidth and hit rate for reading operations.
  </center>
  <center>
  -<img src="user_guide_src/hc_read.png" width="450"/>
  +<img src="user_guide_src/hc_write.png" width="450"/>
  Fig. 6: Bandwidth and hit rate for writing operations.
  </center>
  