Minor modifications in annotations and help

python_3.9.def

@@ -9,7 +9,7 @@ Authors : valentin.vautrot@u-bourgogne.fr
 python3.9.6 is installed in /usr/bin/python3.9/
 
 non-default python3.9.6 libs are installed in /usr/lib/python3.9/site-packages/
-pip-installed packages can be called with :
+pip-installed packages can be listed with :
 singularity exec -e /path/to/this/sif/image python3 -m pip list installed
 or
 singularity test /path/to/this/sif/image
@@ -73,5 +73,5 @@ python3 -m pip list
 %labels 
 container_version v0.1
 Creation date 2023-09-13
-Contained_OS_version CentOS 8.5.211
+Contained_OS_version CentOS_8.5.211
 Contained_python_version 3.9.6
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