Pin older cryptography version that doesn't require rust.

Fizzadar · Fizzadar · commit c788b8cd7ccd · 2021-02-14T18:53:40.000Z
Fixes the `pip.py` example on Alpine.
diff --git a/examples/pip.py b/examples/pip.py
@@ -52,7 +52,7 @@
 # use that virtualenv to install pyinfra
 pip.packages(
     name='Install pyinfra into a virtualenv',
-    packages='pyinfra',
+    packages=['pyinfra', 'cryptography==3.3.2'],
     virtualenv='/usr/local/bin/venv',
 )
 

Original file line number	Diff line number	Diff line change
`@@ -52,7 +52,7 @@`
`52`	`52`	`# use that virtualenv to install pyinfra`
`53`	`53`	`pip.packages(`
`54`	`54`	`name='Install pyinfra into a virtualenv',`
`55`		`- packages='pyinfra',`
	`55`	`+ packages=['pyinfra', 'cryptography==3.3.2'],`
`56`	`56`	`virtualenv='/usr/local/bin/venv',`
`57`	`57`	`)`
`58`	`58`