Fixed typo

Author: LucasDondo

README.md

@@ -196,7 +196,7 @@ that.
 ### Errors
 
 Most functions return a `Result` to expose a potential C++ exception. Although some methods like property reads
-or functions that are marked CV_NOEXCEPT in the OpenCV headers are infallible and return a naked value.
+or functions that are marked `CV_NOEXCEPT` in the OpenCV headers are infallible and return a naked value.
 
 ### CV_MAKETYPE