Revised package installation instructions

Author: stukowski

README_Template.md

@@ -1,5 +1,5 @@
 # [[FileReaderName]]
-[[One line description]]
+[[One-line description]]
 
 ## Description
 [[Full description]]
@@ -11,15 +11,16 @@
 [[Usage example]]
 
 ## Installation
-- OVITO PRO built-in Python interpreter
-```
-ovitos -m pip install --user git+[[Repository Link]].git
-``` 
-- Standalone Python package or Conda environment
-```
-pip install --user git+[[Repository Link]].git
-```
-- Please note that the `--user` tag is recommended but optional and depends on your Python installation.
+- OVITO Pro [integrated Python interpreter](https://docs.ovito.org/python/introduction/installation.html#ovito-pro-integrated-interpreter):
+  ```
+  ovitos -m pip install --user git+[[Repository Link]].git
+  ``` 
+  The `--user` option is recommended and [installs the package in the user's site directory](https://pip.pypa.io/en/stable/user_guide/#user-installs).
+
+- Other Python interpreters or Conda environments:
+  ```
+  pip install git+[[Repository Link]].git
+  ```
 
 ## Technical information / dependencies
 - Tested on OVITO version [[VersionNumber]]

pyproject.toml

@@ -11,11 +11,9 @@ authors = [{name = "[[Author 1 name]]", email = "[[Author 1 email]]"}, {name = "
 maintainers = [{name = "[[Maintainer 1 name]]", email = "[[Maintainer 1 email]]"}, {name = "[[Maintainer 2 name]]", email = "[[Maintainer 2 email]]"}]
 license = {text = "[[License]]"}
 readme = "README.md"
-requires-python = "[[>=3.7]]"
+requires-python = ">=3.7"
 dependencies = [
-    "ovito >= [[VersionNumber]]", # OVITO must be >=3.9!
-    # "[[dependency1]]",
-    # "[[dependency2 == Version]]",
+    "ovito >= 3.9.1",
 ]
 
 [project.urls]