docs: Remove remaining mentions of experimentalCertManager

Author: Techassi

docs/modules/secret-operator/pages/cert-manager.adoc

@@ -43,7 +43,7 @@ include::example$cert-manager/issuer.yaml[]
 == Creating a SecretClass
 
 The Stackable Secret Operator needs to know how to request the certificates from Cert-Manager.
-Do this by creating a xref:secretclass.adoc[] using the xref:secretclass.adoc#backend-certmanager[`experimentalCertManager` backend].
+Do this by creating a xref:secretclass.adoc[] using the xref:secretclass.adoc#backend-certmanager[`certManager` backend].
 
 [source,yaml]
 ----

extra/crds.yaml

@@ -53,13 +53,13 @@ pub mod versioned {
         /// A new certificate and key pair will be generated and signed for each Pod, keys or certificates are never reused.
         AutoTls(AutoTlsBackend),
 
-        /// The [`experimentalCertManager` backend][1] injects a TLS certificate issued
-        /// by [cert-manager](https://cert-manager.io/).
+        /// The [`certManager` backend][1] injects a TLS certificate issued by [cert-manager].
         ///
         /// A new certificate will be requested the first time it is used by a Pod, it
         /// will be reused after that (subject to cert-manager renewal rules).
         ///
         /// [1]: DOCS_BASE_URL_PLACEHOLDER/secret-operator/secretclass#backend-certmanager
+        /// [cert-manager]: https://cert-manager.io/
         #[versioned(changed(since = "v1alpha2", from_name = "ExperimentalCertManager"))]
         CertManager(CertManagerBackend),