pipx: update page (#8696)

pages/common/pipx.md

@@ -1,7 +1,7 @@
 # pipx
 
 > Install and run python applications in isolated environments.
-> More information: <https://github.com/pipxproject/pipx>.
+> More information: <https://github.com/pypa/pipx>.
 
 - Run an app in a temporary virtual environment:
 
@@ -18,3 +18,11 @@
 - Run an app in a temporary virtual environment with a package name different from the executable:
 
 `pipx run --spec {{httpx-cli}} {{httpx}} {{http://www.github.com}}`
+
+- Inject dependencies into an existing virtual environment:
+
+`pipx inject {{package}} {{dependency1 dependency2 ...}}`
+
+- Install a package in a virtual environment with pip arguments:
+
+`pipx install --pip-args='{{pip-args}}' {{package}}`