docs: update branch name to main from master

[JamBalaya56562]

Why:

Some repository branches were renamed from master to main.

What's being changed (if available, include any code snippets, screenshots, or gifs):

Update default branch references in documentation from master to main.

Documentation:

• Replace master branch with main in the GitHub Actions CI workflow template link.
• Update raw repository URL example to use main branch in repository limits documentation.
• Change VS Code recipe link to point to the main branch in debugging guide.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[github-actions]

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Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
contributing/writing-for-github-docs/templates.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14
repositories/creating-and-managing-repositories/repository-limits.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[Sharra-writes]

@JamBalaya56562 Looks like these all work and fix some redirects, so I'll get them added to the merge queue once checks are passing.

[github-actions]

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