clarify which flux version to use

docs/installation_instructions.rst

@@ -56,7 +56,8 @@ be run on the provisioning machine, unless specified otherwise:
   (``apt install python3-pip python3-dev git`` on Debian)
 - ``ssh-agent`` to give you access to your VPS
 - ``kubectl`` (`installation instructions <https://kubernetes.io/docs/tasks/tools/#kubectl>`__)
-- ``flux`` (`installation instructions <https://fluxcd.io/docs/installation/#install-the-flux-cli>`__)
+- ``flux version 0.14.2`` Download from: https://github.com/fluxcd/flux2/releases/download/v0.14.2/flux_0.14.2_linux_amd64.tar.gz
+
 - We recommend using a `python
   virtualenv <https://docs.python.org/3/tutorial/venv.html>`__ to make
   sure we do not change any of your other projects. Install virtualenv