Update Linguist languages.yml to latest upstream

[github-actions]

Summary

• Updates config/languages.yml to the latest version from github-linguist/linguist

This PR was automatically created by the Update Linguist workflow.

[greptile-apps]

Greptile Summary

Automated sync of config/languages.yml from the upstream github-linguist/linguist repository, adding two new file extensions:

• .txtpb added to Protocol Buffer Text Format (line 6060)
• .icls added to XML (line 8689)

Both additions are correctly placed in alphabetical order within their respective extension lists. The file is consumed by LanguageUtils (app/lib/language_utils.rb) which loads it at runtime via YAML.load_file — no schema or structural changes, so existing functionality is unaffected.

Confidence Score: 5/5

• This PR is safe to merge with no risk — it only adds two file extensions to an existing data file synced from a trusted upstream source.
• The change is a trivial, automated data-only update (2 lines added) from the official github-linguist upstream. No code logic, no new dependencies, no structural changes. The YAML structure is preserved correctly with proper indentation and alphabetical ordering.
• No files require special attention

Important Files Changed

Filename	Overview
config/languages.yml	Adds two new file extensions from upstream linguist: .txtpb for Protocol Buffer Text Format and .icls for XML. Both are correctly placed in alphabetical order within their respective extension lists.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["GitHub Actions Workflow\n(update-linguist.yml)"] -->|"Fetches latest"| B["Upstream linguist/languages.yml"]
    B -->|"Copies to"| C["config/languages.yml\n(+.txtpb, +.icls)"]
    C -->|"Loaded by"| D["LanguageUtils.data\n(app/lib/language_utils.rb)"]
    E["config/languages_custom.yml"] -->|"deep_merge override"| D
    D -->|"Provides"| F["Language names, colors,\nextensions, aliases"]

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_{Last reviewed commit: 3380993}