Update ml-images-ReadMe.md

Fix incorrect format in showing the context of pyvenv.cfg

ml-images-ReadMe.md

@@ -339,11 +339,13 @@ consequently concealing packages with identical names in the new environment.
 Thankfully, the [pyvenv.cfg](https://python.readthedocs.io/en/latest/library/site.html?highlight=pyvenv%20cfg) file, 
 specifically designed for Python virtual environments, offers a solution to the above challenge:
 
-> Singularity> cat pyvenv.cfg 
->  home = /cvmfs/unpacked.cern.ch/.flat/8e/8e1e32f4a80a16356dde5c933638471b7d43f042ee163b8cdba36c8b504227f6/opt/conda/bin
->  **include-system-site-packages** = true
->  version = 3.9.19
-> Singularity>
+```shell
+Singularity> cat pyvenv.cfg
+ home = /cvmfs/unpacked.cern.ch/.flat/8e/8e1e32f4a80a16356dde5c933638471b7d43f042ee163b8cdba36c8b504227f6/opt/conda/bin
+ **include-system-site-packages** = true
+ version = 3.9.19
+Singularity>
+```
 
 In the file, the parameter *include-system-site-packages* is set to true, and the `python3` 
 in the new environment directory is **sym-linked** to the `python3` from the image path.