Fix duplicate categories: normalize Portuguese and Python tags

[Valyrian-Code]

Fixes #110

Three tutorials had inconsistent category tags that created duplicate filter entries on the site:

• GRASS_movement_pt.qmd: Português → Portuguese
• GRASS_terrain_pt.qmd: Português → Portuguese
• noise.qmd: python → Python

This removes the duplicate [Português/Portuguese] and [Python/python] entries from the category filter.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Cleanup pass across tutorial content to normalize external manual URLs, fix a broken link, correct project/path references, update a deprecated tile provider name, and standardize category labels.

Changes:

• Replace versioned grass83/grass84 manual URLs with grass-stable and fix an incorrect t.rast.univar link target.
• Fix code references in time series aggregations tutorial (grassbin → "grass", project path, and CartoDark → CartoDB.DarkMatter).
• Normalize category labels (Português → Portuguese, python → Python).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
content/tutorials/time_series/time_series_query_with_vector.qmd	Update t.sample manual URL to grass-stable.
content/tutorials/time_series/time_series_management_and_visualization.qmd	Update manual URLs to grass-stable and fix wrong t.rast.univar link.
content/tutorials/time_series/time_series_aggregations.qmd	Fix subprocess call, project path, and tile provider name.
content/tutorials/terrain_and_DEMs/GRASS_terrain_pt.qmd	Standardize language category to Portuguese.
content/tutorials/noise/noise.qmd	Capitalize Python category.
content/tutorials/modeling_movement/GRASS_movement_pt.qmd	Standardize language category to Portuguese.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[petrasovaa]

Thanks!