Correct pkg-config method in Qt dependency docs [skip ci]
@@ -427,7 +427,7 @@ include path of the given module(s) to the compiler flags. (since v0.47.0)
**Note** using private headers in your project is a bad idea, do so at your own
risk.
-`method` may be `auto`, `pkgconfig` or `qmake`.
+`method` may be `auto`, `pkg-config` or `qmake`.
## SDL2
