4.6 to 5.0: More about Ibexa Cloud

[adriendupuis]

Decrease "Finalizing" section's heading levels to have them in the page ToC

Question	Answer
JIRA Ticket	N/A
Versions	All
Edition	All

• Change "Finalizing" section's heading level so it appers in the page's table of content
• TODO: Give more context about why Ibexa Cloud config must be updated

Checklist

• Text renders correctly
• Text has been checked with vale
• Description metadata is up to date
• Redirects cover removed/moved pages
• Code samples are working
• PHP code samples have been fixed with PHP CS fixer
• Added link to this PR in relevant JIRA ticket or code PR

[github-actions]

Preview of modified files

Preview of modified Markdown:

• docs/update_and_migration/from_4.6/update_to_5.0.md