docs: fix bad references to find and get pages

closes vuejs#1420

Author: dobromir-hristov

docs/api/wrapper/find.md

@@ -32,4 +32,4 @@ const fooRef = wrapper.find({ ref: 'foo' })
 expect(fooRef.is(Foo)).toBe(true)
 ```
 
-See also: [get](../get.md).
+See also: [get](./get.md).

docs/api/wrapper/get.md

@@ -1,6 +1,6 @@
 ## get
 
-Works just like [find](../find.md) but will throw an error if nothing matching
+Works just like [find](./find.md) but will throw an error if nothing matching
 the given selector is found. You should use `find` when searching for an element
 that may not exist. You should use this method when getting an element that should
 exist and it will provide a nice error message if that is not the case.