updated jupyterlab version from 3.6.6 to 3.6.8

Author: prabhatkc

requirements/sfrc_requirements.txt

@@ -1,7 +1,7 @@
 PyWavelets==1.3.0
 pydicom==2.4.3
 opencv-python==4.8.1.78
-jupyterlab==3.6.6
+jupyterlab==3.6.8
 mpi4py==3.1.5
 bm3d==4.0.1
 shapely==2.0.2