Fix typo (#883)

Fixing a minor error to increase readability.

src/docs/configuration/dependencies/README.md

@@ -2,7 +2,7 @@
 
 Shadow configures the default `shadowJar` task to merge all dependencies from the project's `runtimeClasspath` configuration
 into the final JAR.
-The configurations to from which to source dependencies for the merging can be configured using the `configurations` property
+The configurations from which to source dependencies for the merging can be configured using the `configurations` property
 of the [`ShadowJar`](http://imperceptiblethoughts.com/shadow/api/com/github/jengelman/gradle/plugins/shadow/tasks/ShadowJar.html) task type.
 
 ```groovy