pyenv: add example to list all installable versions (#8327)

* pyenv: add example to list all installable versions
* pyenv: add italian translation

Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com>
Suggested-by: Marco Bonelli <mebeim@users.noreply.github.com>
Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>

pages.it/common/pyenv.md

@@ -11,6 +11,10 @@
 
 `pyenv versions`
 
+- Elenca tutte le versioni di Python che possono essere installate da upstream:
+
+`pyenv install --list`
+
 - Installa una distribuzione di Python nella cartella `${PYENV_ROOT}/versions`:
 
 `pyenv install {{2.7.10}}`

pages/common/pyenv.md

@@ -11,6 +11,10 @@
 
 `pyenv versions`
 
+- List all Python versions that can be installed from upstream:
+
+`pyenv install --list`
+
 - Install a Python version under the `${PYENV_ROOT}/versions` directory:
 
 `pyenv install {{2.7.10}}`