Update .gitignore

Author: stanley-cheung

.gitignore

@@ -28,4 +28,4 @@ bin/
 .devcontainer/
 
 ## build generated file
-grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Versions.java
+grpc-common-spring-boot/src/main/java/net/devh/boot/grpc/common/util/Constants.java