readme: add missing "go" marker

This enables proper syntax highlighting on GitHub.
fiorix · Jan 9, 2019 · 7389f5f · 7389f5f
1 parent 19735c0
commit 7389f5f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -40,7 +40,7 @@ The process is this:
 
 Example:
 
-```
+```go
 import (
 	"/path/to/generated/example"