Fix version constraint operator ind FAQ-Docs (#4267)

docs/faq.md

@@ -41,7 +41,7 @@ The only good alternative is to define an upper bound on your constraints,
 which you can increase in a new release after testing that your package is compatible
 which you can increase in a new release after testing that your package is compatible
 with the new major version of your dependency.
 with the new major version of your dependency.
 
 
-For example instead of using `>=3.4` you should use `~3.4` which allows all versions `<4.0`.
+For example instead of using `>=3.4` you should use `^3.4` which allows all versions `<4.0`.
 The `^` operator works very well with libraries following [semantic versioning](https://semver.org).
 The `^` operator works very well with libraries following [semantic versioning](https://semver.org).
 
 
 ### Is tox supported?
 ### Is tox supported?