Bring the Python version up to date ;-)

f'strings' and better performance.

Author: cclauss

dependencies.html.md.erb

@@ -54,7 +54,7 @@ venv
 ```
 
 <p class="note">
-<strong>Note</strong>: Cloud Foundry uses the latest version of Python 2 by default. To change that, create a <code>runtime.txt</code> file and put the respective version number into it (e.g. <code>python-3.5.2</code>). Be aware however, that Cloud Foundry only accepts the version specified <a href="https://github.com/cloudfoundry/python-buildpack/blob/master/manifest.yml" target="_blank">here</a>.
+<strong>Note</strong>: Cloud Foundry uses the latest version of Python 2 by default. To change that, create a <code>runtime.txt</code> file and put the respective version number into it (e.g. <code>python-3.6.1</code>). Be aware however, that Cloud Foundry only accepts the version specified <a href="https://github.com/cloudfoundry/python-buildpack/blob/master/manifest.yml" target="_blank">here</a>.
 </p>
 
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