Update README.md

Author: AdamDang

grafana/README.md

@@ -19,7 +19,7 @@ $ ARCH=${ARCH} make build
 
 ## How to release:
 
-This image supports multiple architecures, which means the Makefile cross-compiles and builds docker images for all architectures automatically when pushing.
+This image supports multiple architectures, which means the Makefile cross-compiles and builds docker images for all architectures automatically when pushing.
 If you are releasing a new version, please bump the `VERSION` value in the `Makefile` before building the images.
 
 How to build and push all images: