fix(tutorials): align code-fence indentation to valid CommonMark (4 tutorials)

[jung-thomas]

Fixes malformed code-fence indentation in 4 tutorials where the opening/closing ``` delimiters drift relative to the code body. Under CommonMark/Goldmark (Hugo) the fence mispairs and runs past the following ### section headings, swallowing them into one `

` and collapsing the tutorial to fewer steps. These render OK today only because a build-time fence healer in tutorials-ims masks them; that healer is being removed (tutorials-ims#2772) in favour of strict CommonMark + an author-time lint, so the source must be corrected. The only change is fence-delimiter indentation; prose, code, and images are unchanged. Slugs: hana-cloud-smart-multi-model-4, -9, -10, hana-cloud-trial-qgis-3.

[sap-tutorials-builder]

Content (8)

• tutorials/hana-cloud-smart-multi-model-10/hana-cloud-smart-multi-model-10.md:1 — Required frontmatter field missing or empty: author_name
• tutorials/hana-cloud-smart-multi-model-10/hana-cloud-smart-multi-model-10.md:1 — Required frontmatter field missing or empty: author_profile
• tutorials/hana-cloud-smart-multi-model-4/hana-cloud-smart-multi-model-4.md:1 — Required frontmatter field missing or empty: author_name
• tutorials/hana-cloud-smart-multi-model-4/hana-cloud-smart-multi-model-4.md:1 — Required frontmatter field missing or empty: author_profile
• tutorials/hana-cloud-smart-multi-model-9/hana-cloud-smart-multi-model-9.md:1 — Required frontmatter field missing or empty: author_name
• tutorials/hana-cloud-smart-multi-model-9/hana-cloud-smart-multi-model-9.md:1 — Required frontmatter field missing or empty: author_profile
• tutorials/hana-cloud-trial-qgis-3/hana-cloud-trial-qgis-3.md:1 — Required frontmatter field missing or empty: author_name
• tutorials/hana-cloud-trial-qgis-3/hana-cloud-trial-qgis-3.md:1 — Required frontmatter field missing or empty: author_profile

Checked a8c61d5 • notify-only, does not block merge