Apply suggestions from code review

Co-authored-by: Sarah Chavis <62406755+schavis@users.noreply.github.com>

Author: stevendpclark

content/vault/v1.16.x/content/api-docs/secret/ssh.mdx

@@ -558,12 +558,10 @@ $ curl \
 ## Submit CA information
 
 This endpoint allows submitting the CA information for the secrets engine via an SSH
-key pair. 
+key pair. If you call submit CA with an existing certificate or key, the
+endpoint returns an error. To update existing values, call the delete CA
+information endpoint before calling the submit endpoint.
 
-<Note>
-If a certificate or key are present, an error will be returned. To update the existing
-values, the Delete CA information API will need to be called first.
-</Note>
 
 | Method | Path             |
 | :----- | :--------------- | -------------------------- |

content/vault/v1.17.x/content/api-docs/secret/ssh.mdx

@@ -562,12 +562,9 @@ $ curl \
 ## Submit CA information
 
 This endpoint allows submitting the CA information for the secrets engine via an SSH
-key pair. 
-
-<Note>
-If a certificate or key are present, an error will be returned. To update the existing
-values, the Delete CA information API will need to be called first.
-</Note>
+key pair. If you call submit CA with an existing certificate or key, the
+endpoint returns an error. To update existing values, call the delete CA
+information endpoint before calling the submit endpoint.
 
 | Method | Path             |
 | :----- | :--------------- | -------------------------- |

content/vault/v1.18.x/content/api-docs/secret/ssh.mdx

@@ -562,12 +562,9 @@ $ curl \
 ## Submit CA information
 
 This endpoint allows submitting the CA information for the secrets engine via an SSH
-key pair. 
-
-<Note>
-If a certificate or key are present, an error will be returned. To update the existing
-values, the Delete CA information API will need to be called first.
-</Note>
+key pair. If you call submit CA with an existing certificate or key, the
+endpoint returns an error. To update existing values, call the delete CA
+information endpoint before calling the submit endpoint.
 
 | Method | Path             |
 | :----- | :--------------- | -------------------------- |

content/vault/v1.19.x/content/api-docs/secret/ssh.mdx

@@ -559,12 +559,9 @@ $ curl \
 ## Submit CA information
 
 This endpoint allows submitting the CA information for the secrets engine via an SSH
-key pair. 
-
-<Note>
-If a certificate or key are present, an error will be returned. To update the existing
-values, the Delete CA information API will need to be called first.
-</Note>
+key pair. If you call submit CA with an existing certificate or key, the
+endpoint returns an error. To update existing values, call the delete CA
+information endpoint before calling the submit endpoint.
 
 | Method | Path             |
 | :----- | :--------------- | -------------------------- |

content/vault/v1.20.x/content/api-docs/secret/ssh.mdx

@@ -559,12 +559,9 @@ $ curl \
 ## Submit CA information
 
 This endpoint allows submitting the CA information for the secrets engine via an SSH
-key pair. 
-
-<Note>
-If a certificate or key are present, an error will be returned. To update the existing
-values, the Delete CA information API will need to be called first.
-</Note>
+key pair. If you call submit CA with an existing certificate or key, the
+endpoint returns an error. To update existing values, call the delete CA
+information endpoint before calling the submit endpoint.
 
 | Method | Path             |
 | :----- | :--------------- | -------------------------- |