DOCSP-49450: Fix LDAP step (#840)

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- [DOCSP-49450](https://jira.mongodb.org/browse/DOCSP-49450)
- Staging:

[LDAP](https://deploy-preview-840--docs-ops-manager.netlify.app/tutorial/enable-ldap-authentication-for-group/)

[Kerberos](https://deploy-preview-840--docs-ops-manager.netlify.app/tutorial/enable-kerberos-authentication-for-group/)

[x509](https://deploy-preview-840--docs-ops-manager.netlify.app/tutorial/enable-x509-authentication-for-group/)

[MONGODB-CR](https://deploy-preview-840--docs-ops-manager.netlify.app/tutorial/enable-mongodbcr-authentication-for-group/)


- [LATEST BUILD
LOG](https://app.netlify.com/sites/docs-ops-manager/deploys/680a5ba759037b000854c278)

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Author: norareidy

source/includes/steps-enable-authentication-kerberos.yaml

@@ -22,7 +22,7 @@ replacement:
 ref: select-auth-type
 post: |
 
-  a. In the :guilabel:`MongoDB Agent Connections to Deployment` section,
+  a. In the :guilabel:`MongoDB Deployment Authentication Mechanism` section,
      select {{mechanism}}.
 
   b. Input your `SASL Service Name <http://www.iana.org/assignments/gssapi-service-names/gssapi-service-names.xhtml>`_.

source/includes/steps-enable-authentication-ldap.yaml

@@ -29,7 +29,7 @@ replacement:
 ref: select-auth-type
 post: |
 
-  a. In the :guilabel:`MongoDB Agent Connections to Deployment` section,
+  a. In the :guilabel:`MongoDB Deployment Authentication Mechanism` section,
      select {{mechanism}}.
 
   b. Select the appropriate type of {{mechanism}} authentication.

source/includes/steps-enable-authentication-mongodbcr.yaml

@@ -37,7 +37,7 @@ content: |
   deployment, but the |mms| Agents can only use *one* authentication
   mechanism.
 
-  In the :guilabel:`MongoDB Agent Connections to Deployment` section,
+  In the :guilabel:`MongoDB Deployment Authentication Mechanism` section,
   select {{mechanism}} and/or {{mechanism2}}.
 
   |mms| automatically generates the Agents' usernames and passwords.

source/includes/steps-enable-authentication-x509.yaml

@@ -19,7 +19,7 @@ replacement:
 ref: select-auth-type
 post: |
 
-  In the :guilabel:`MongoDB Agent Connections to Deployment` section, 
+  In the :guilabel:`MongoDB Deployment Authentication Mechanism` section, 
   select {{mechanism}}.
 
   .. important::