chore(requirements): add invisible-watermark

Author: gadicc

requirements.txt

@@ -59,4 +59,6 @@ tensorboard==2.12.0
 
 xtarfile[zstd]==0.1.0
 
-bitsandbytes==0.40.2 # released 2023-07-17
+bitsandbytes==0.40.2 # released 2023-07-17
+
+invisible-watermark==0.2.0 # released 2023-07-06