Adding SUSE SLES 15 and openSUSE as supported platforms

I do work for SUSE and we'd like to be listed in the supported platforms

README.md

@@ -54,7 +54,7 @@ conda install -c conda-forge jupyterlab
 
 #### pip
 
-pip is a package management system for installing and updating Python packages, and comes with any Python installation. On Ubuntu and Fedora Linux, use the system package manager to install the `python3-pip` package. [\_The Hitchhiker's Guide to Python_provides guidance on how to install Python](https://docs.python-guide.org/starting/installation/); Another option is to [install Python directly from python.org](https://www.python.org/getit/). We suggest you [upgrade pip](https://pip.pypa.io/en/stable/installing/) before using it to install other programs.
+pip is a package management system for installing and updating Python packages, and comes with any Python installation. On Ubuntu, SUSE Enterprise Linux,openSUSE and Fedora Linux, use the system package manager to install the `python3-pip` package. [\_The Hitchhiker's Guide to Python_provides guidance on how to install Python](https://docs.python-guide.org/starting/installation/); Another option is to [install Python directly from python.org](https://www.python.org/getit/). We suggest you [upgrade pip](https://pip.pypa.io/en/stable/installing/) before using it to install other programs.
 
 JupyterLab requires Python 3.5 or higher.
 
@@ -71,7 +71,10 @@ JupyterLab requires Python 3.5 or higher.
     python -m pip install jupyterlab
     ```
 
-Some systems have a `pip3` command that has the same effect as `python3 -m pip` and/or a `pip` command that behaves the same as `python -m pip`.
+Some systems have a `pip3` command that has the same effect as `python3 -m pip` and/or a `pip` command that behaves the same as `python -m pip`.On SUSE Entprise Linux 15 and openSUSE simply run:
+```bash
+    py -3 -m pip install jupyterlab
+```
 
 Adding `--user` after `pip install` will install the files to a local user install directory (typically `~/.local/` or `%APPDATA%\Python` on Windows) instead of the system-wide directory. This can be helpful, especially if writing to the system-wide directory is not permitted. However, the user-level `bin` directory must be added to the `PATH` environment variable in order to launch `jupyter lab`.