Merge branch 'fix/readme-pip-index' into 'master'

Fix missing index url in README

See merge request !1135

README.md

@@ -40,7 +40,7 @@ source .venv/bin/activate
 # Install pycalibration
 python3 -m pip install --upgrade pip
 # Use 'pip install -e .' for editable install
-python3 -m pip install .
+python3 -m pip install --index-url https://git.xfel.eu/api/v4/groups/501/-/packages/pypi/simple .
 ```
 
 ### Installation into user home directory
@@ -65,7 +65,7 @@ pyenv shell 3.11.9
 
 # Install pycalibration
 # Use 'pip install --user -e .' for editable install
-pip install --user .
+pip install --index-url https://git.xfel.eu/api/v4/groups/501/-/packages/pypi/simple --user .
 
 # Update PATH
 export PATH=$HOME/.local/bin:$PATH