Merge branch '3767-postgres-pw-special-chars' into 'master'

Document quoting for gitlab-ctl pg-password-md5 command

Closes #3767

See merge request https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/7194

Merged-by: Evan Read <[email protected]>
Approved-by: Evan Read <[email protected]>
Approved-by: Andrew Patterson <[email protected]>
Co-authored-by: dustinmm80 <[email protected]>

Author: eread

doc/settings/database.md

@@ -321,8 +321,8 @@ The following settings are affected in the `postgresql` block:
    postgresql['trust_auth_cidr_addresses'] = %w(127.0.0.1/24)
    postgresql['sql_user'] = "gitlab"
 
-   ##! SQL_USER_PASSWORD_HASH can be generated using the command `gitlab-ctl pg-password-md5 gitlab`,
-   ##! where `gitlab` is the name of the SQL user that connects to GitLab.
+   ##! SQL_USER_PASSWORD_HASH can be generated using the command `gitlab-ctl pg-password-md5 'gitlab'`,
+   ##! where 'gitlab' (single-quoted to avoid shell interpolation) is the name of the SQL user that connects to GitLab.
    postgresql['sql_user_password'] = "SQL_USER_PASSWORD_HASH"
 
    # force ssl on all connections defined in trust_auth_cidr_addresses and md5_auth_cidr_addresses