27.6-RC6

Changes compared to: 27.6-RC5

Non user facing:

• Removes unnecessary filter for the minimum post threshold of enabling the content planner. #23223
• Fixes a bug where the Content Planner inline banner was wider than adjacent blocks in Twenty Twenty-One theme. #23228
• Adds 8px of horizontal spacing between the rightmost header element and the close button in the Content Planner Content suggestions and Content outline modals. #23226
• Adds the color transition to the yoast logo when loading suggestions for the Content suggestions feature. #23230
• Adds the wpseo_enable_ai_content_planner_inline_banner filter to hide the AI Content Planner inline banner from the post editor. #23232