Improve release workflow: Add armv7 support and fix MIPS build issue

[pdahd]

This pull request improves the release workflow by adding support for the Linux ARMv7 (arm/7) architecture and fixing a build issue related to MIPS architectures.

Changes:

• Added support for Linux ARMv7 (arm/7): This allows the project to be built and released for devices using the ARMv7 architecture, expanding its compatibility.
• Excluded unsupported macOS architectures: The darwin/arm and darwin/386 architectures have been excluded from the build matrix, as they are not supported by macOS.
• Fixed MIPS build issue: The original wangyoucao577/go-release-action@v1 action had a bug in its release.sh script that caused a "mips: unbound variable" error. This issue has been resolved by using a forked and modified version of the action: pdahd/[email protected]. The fix involves changing the string comparison method in the script to correctly handle MIPS architectures.

Benefits:

• Wider platform support: The project can now be used on a wider range of devices, including those using the ARMv7 architecture.
• Improved build reliability: The fixed MIPS build issue ensures that the release workflow runs smoothly and produces binaries for all supported platforms.

Testing:

The updated release workflow has been tested successfully, and all supported platforms and architectures have been built and released without errors.

Recommendation:

I recommend releasing a new version of the project that includes these changes, potentially as v1.5.4 or v1.6.0.