image, singleuser-sample: refreeze a final time

Author: consideRatio

images/singleuser-sample/requirements.txt

@@ -218,7 +218,7 @@ pexpect==4.8.0
     # via ipython
 pickleshare==0.7.5
     # via ipython
-platformdirs==3.0.0
+platformdirs==3.1.0
     # via jupyter-core
 prometheus-client==0.16.0
     # via