Fix text and markdown

What does this MR do?

Fixes issues with text and markdown

Author's checklist

• Apply the correct labels and milestone
• Port the MR to EE (or backport from CE): always recommended, required when the ee-compat-check job fails (https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9203)

Review checklist

• Technical writer's review (required)
• Merge the EE-MR first (https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9203), CE-MR afterwards