Update repository name in docs-syncing workflow; revise README

[josh-wong]

Description

This PR changes the repository name from cd-collection to music-collection in the docs-syncing workflow and updates the README.

Related issues and/or PRs

• Change mentions of cd-collection to music-collection josh-wong.github.io#135

Changes made

• Changed the repository name from cd-collection to music-collection in the .github/workflows/sync-docs.yml workflow.
• Made the README a bit more generic to include vinyl records in addition to CDs.

Checklist

The following is a best-effort checklist. If any items in this checklist aren't applicable to this PR, add N/A after each item.

Documentation

• I have updated the side navigation as necessary. N/A
• I have updated the documentation to reflect the changes.
• I have documented or updated any remaining open issues linked to this PR in GitHub, Obsidian, etc.

Build, deploy, and test

• I have merged and published any dependent changes in other PRs.
• I have commented my code, particularly in hard-to-understand areas. N/A
• I have checked that my changes look as expected on a locally built version of the docs site. N/A
• My changes generate no new warnings. N/A

[github-actions]

All items in the checklist have been checked🎉

[github-actions]

All items in the checklist have been checked🎉