Clarify sentence about get_logger() arguments (#706)

Currently the sentence starts with "these", but it's not clear to what that word refers.

Author: ttrei

docs/configuration.md

@@ -75,7 +75,7 @@ It's a callable that returns the logger that gets wrapped and returned.
 In the simplest case, it's a function that returns a logger -- or just a class.
 But you can also pass in an instance of a class with a `__call__` method for more complicated setups.
 
-These will be passed to the logger factories.
+The arguments you pass to `structlog.get_logger()` will be passed to the logger factory.
 For example, if you use `structlog.get_logger("a name")` and configure *structlog* to use the standard library {class}`~structlog.stdlib.LoggerFactory`, which has support for positional parameters, the returned logger will have the name `"a name"`.
 
 For the common cases of standard library logging and Twisted logging, *structlog* comes with two factories built right in: