CI: update environment configuration

[lihuanhuan]

Summary by CodeRabbit

• Chores
  • Updated the build workflow to use the latest Ubuntu runner environment.
  • Simplified build naming logic for firmware builds in the Makefile; no changes to build outputs or flags.

[coderabbitai]

Walkthrough

The build environment for the GitHub Actions workflow was updated to use "ubuntu-latest" instead of "ubuntu-20.04". The Makefile logic for naming firmware builds was simplified by integrating conditional naming into a single block. No changes were made to exported or public entities.

Changes

Files/Paths	Change Summary
.github/workflows/build-pro.yml	Changed runner from "ubuntu-20.04" to "ubuntu-latest" in the workflow.
core/Makefile	Simplified conditional logic for FIRMWARE_BUILD_NAME assignment; no other logic changed.

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📜 Recent review details

Configuration used: CodeRabbit UI
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📥 Commits

Reviewing files that changed from the base of the PR and between 6e0b3a3 and 13f7637.

📒 Files selected for processing (2)

• .github/workflows/build-pro.yml (1 hunks)
• core/Makefile (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (3)

• GitHub Check: Gen check
• GitHub Check: Style check
• GitHub Check: Defs check

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