Add logging header formats in doc

CatherineF-dev · web-flow · commit 24e42d0c10e8 · 2021-11-01T16:40:26.000-04:00
Add link for explaining logging header format `I1025 00:15:15.525108       1 controller_utils.go:116]`
diff --git a/contributors/devel/sig-instrumentation/migration-to-structured-logging.md b/contributors/devel/sig-instrumentation/migration-to-structured-logging.md
@@ -166,6 +166,7 @@ type KMetadata interface {
 	GetNamespace() string
 }
 ```
+Logging header formats are in [here](https://github.com/golang/glog/blob/23def4e6c14b4da8ac2ed8007337bc5eb5007998/glog.go#L523-L533)
 
 ## Migration
 

Original file line number	Diff line number	Diff line change
`@@ -166,6 +166,7 @@ type KMetadata interface {`
`166`	`166`	`GetNamespace() string`
`167`	`167`	`}`
`168`	`168`	```
	`169`	`+Logging header formats are in [here](https://github.com/golang/glog/blob/23def4e6c14b4da8ac2ed8007337bc5eb5007998/glog.go#L523-L533)`
`169`	`170`
`170`	`171`	`## Migration`
`171`	`172`