[stable/prometheus-mysql-exporter]: fix docs typo (#22674)

Signed-off-by: Carlos Alexandro Becker <caarlos0@gmail.com>

stable/prometheus-mysql-exporter/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 description: A Helm chart for prometheus mysql exporter with cloudsqlproxy
 name: prometheus-mysql-exporter
-version: 0.5.2
+version: 0.5.3
 home: https://github.com/prometheus/mysqld_exporter
 appVersion: v0.11.0
 sources:

stable/prometheus-mysql-exporter/README.md

@@ -65,7 +65,7 @@ The following table lists the configurable parameters of the mysql exporter char
 | `cloudsqlproxy.instanceConnectionName` | Google Cloud instance connection name               | `project:us-central1:dbname`       |
 | `cloudsqlproxy.port`                   | Cloud SQL Proxy listening port                      | `3306`                             |
 | `cloudsqlproxy.credentials`            | Cloud SQL Proxy service account credentials         | `bogus credential file`            |
-| `serviceMonitor.enable`                | Integration with prometheus-operator                | `false`                            |
+| `serviceMonitor.enabled`               | Integration with prometheus-operator                | `false`                            |
 | `serviceMonitor.interval`              | Interval for polling this exporter                  |                                    |
 | `serviceMonitor.scrapeTimeout`         | Timeout where exporter is considered faulty         |                                    |
 | `serviceMonitor.jobLabel`              | Label to use to retrieve the job name from          | `""`                               |