Fix nested container overflow in heading prettyblock

[CySSoO]

Motivation

• Prevent horizontal overflow caused by rendering a nested .container inside an existing .container > .row for heading/title blocks.

Description

• Adjusted the wrapper condition in views/templates/hook/prettyblocks/prettyblock_heading.tpl so the inner .container is rendered only when default.force_full_width is true instead of when default.container is true.
• This removes the problematic container > row > container structure while preserving the constrained inner wrapper for full-width blocks.

Testing

• Inspected the template diff with git diff to confirm the conditional change and the single-line edit succeeded; result was as expected (success).
• Verified the file contents with nl -ba views/templates/hook/prettyblocks/prettyblock_heading.tpl | sed -n '20,45p' to ensure the new condition appears in the correct location (success).
• Committed the change with git commit and prepared the PR metadata via the repository helper (commands completed successfully).

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Codex Task