Fix feature-gates/z*.md content format

Author: 1000Delta

content/en/docs/reference/command-line-tools-reference/feature-gates/zero-limited-nominal-concurrency-shares.md

@@ -11,5 +11,5 @@ stages:
     fromVersion: "1.29"
 ---
 Allow [Priority & Fairness](/docs/concepts/cluster-administration/flow-control/)
-in the API server to use a zero value for the `nominalConcurrencyShares field of
+in the API server to use a zero value for the `nominalConcurrencyShares` field of
 the `limited` section of a priority level.