graduate MatchLabelKeysInPodAffinity to beta (#45181)

* graduate MatchLabelKeysInPodAffinity to beta

* update feature-state

* Correct the grammar

Co-authored-by: Tim Bannister <tim@scalefactory.com>

* add comments

* Update version appropriately

---------

Co-authored-by: Tim Bannister <tim@scalefactory.com>

Author: sanposhiho

content/en/docs/concepts/scheduling-eviction/assign-pod-node.md

@@ -363,10 +363,10 @@ null `namespaceSelector` matches the namespace of the Pod where the rule is defi
 {{< feature-state feature_gate_name="MatchLabelKeysInPodAffinity" >}}
 
 {{< note >}}
-<!-- UPDATE THIS WHEN PROMOTING TO BETA -->
-The `matchLabelKeys` field is an alpha-level field and is disabled by default in
+<!-- UPDATE THIS WHEN PROMOTING TO STABLE -->
+The `matchLabelKeys` field is a beta-level field and is enabled by default in
 Kubernetes {{< skew currentVersion >}}.
-When you want to use it, you have to enable it via the
+When you want to disable it, you have to disable it explicitly via the
 `MatchLabelKeysInPodAffinity` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/).
 {{< /note >}}
 
@@ -414,10 +414,10 @@ spec:
 {{< feature-state feature_gate_name="MatchLabelKeysInPodAffinity" >}}
 
 {{< note >}}
-<!-- UPDATE THIS WHEN PROMOTING TO BETA -->
-The `mismatchLabelKeys` field is an alpha-level field and is disabled by default in
+<!-- UPDATE THIS WHEN PROMOTING TO STABLE -->
+The `mismatchLabelKeys` field is a beta-level field and is enabled by default in
 Kubernetes {{< skew currentVersion >}}.
-When you want to use it, you have to enable it via the
+When you want to disable it, you have to disable it explicitly via the
 `MatchLabelKeysInPodAffinity` [feature gate](/docs/reference/command-line-tools-reference/feature-gates/).
 {{< /note >}}
 

content/en/docs/reference/command-line-tools-reference/feature-gates/match-label-keys-in-pod-affinity.md

@@ -9,6 +9,10 @@ stages:
   - stage: alpha
     defaultValue: false
     fromVersion: "1.29"
+    toVersion: "1.30"
+  - stage: beta
+    defaultValue: true
+    fromVersion: "1.31"
 ---
-Enable the `matchLabelKeys` and `mismatchLabelKeys` field for
+Enable the `matchLabelKeys` and `mismatchLabelKeys` fields for
 [pod (anti)affinity](/docs/concepts/scheduling-eviction/assign-pod-node/).