contextual logging: document promotion to beta

content/en/docs/concepts/cluster-administration/system-logs.md

@@ -122,7 +122,7 @@ second line.}
 
 ### Contextual Logging
 
-{{< feature-state for_k8s_version="v1.24" state="alpha" >}}
+{{< feature-state for_k8s_version="v1.30" state="beta" >}}
 
 Contextual logging builds on top of structured logging. It is primarily about
 how developers use logging calls: code based on that concept is more flexible
@@ -133,8 +133,8 @@ If developers use additional functions like `WithValues` or `WithName` in
 their components, then log entries contain additional information that gets
 passed into functions by their caller.
 
-Currently this is gated behind the `StructuredLogging` feature gate and
-disabled by default. The infrastructure for this was added in 1.24 without
+Currently this is gated behind the `ContextualLogging` feature gate and
+enabled by default. The infrastructure for this was added in 1.24 without
 modifying components. The
 [`component-base/logs/example`](https://github.com/kubernetes/kubernetes/blob/v1.24.0-beta.0/staging/src/k8s.io/component-base/logs/example/cmd/logger.go)
 command demonstrates how to use the new logging calls and how a component
@@ -147,14 +147,14 @@ $ go run . --help
       --feature-gates mapStringBool  A set of key=value pairs that describe feature gates for alpha/experimental features. Options are:
                                      AllAlpha=true|false (ALPHA - default=false)
                                      AllBeta=true|false (BETA - default=false)
-                                     ContextualLogging=true|false (ALPHA - default=false)
+                                     ContextualLogging=true|false (BETA - default=true)
 $ go run . --feature-gates ContextualLogging=true
 ...
-I0404 18:00:02.916429  451895 logger.go:94] "example/myname: runtime" foo="bar" duration="1m0s"
-I0404 18:00:02.916447  451895 logger.go:95] "example: another runtime" foo="bar" duration="1m0s"
+I0222 15:13:31.645988  197901 example.go:54] "runtime" logger="example.myname" foo="bar" duration="1m0s"
+I0222 15:13:31.646007  197901 example.go:55] "another runtime" logger="example" foo="bar" duration="1h0m0s" duration="1m0s"
 ```
 
-The `example` prefix and `foo="bar"` were added by the caller of the function
+The `logger` key and `foo="bar"` were added by the caller of the function
 which logs the `runtime` message and `duration="1m0s"` value, without having to
 modify that function.
 
@@ -165,8 +165,8 @@ is not in the log output anymore:
 ```console
 $ go run . --feature-gates ContextualLogging=false
 ...
-I0404 18:03:31.171945  452150 logger.go:94] "runtime" duration="1m0s"
-I0404 18:03:31.171962  452150 logger.go:95] "another runtime" duration="1m0s"
+I0222 15:14:40.497333  198174 example.go:54] "runtime" duration="1m0s"
+I0222 15:14:40.497346  198174 example.go:55] "another runtime" duration="1h0m0s" duration="1m0s"
 ```
 
 ### JSON log format