attempt to fix arm release

This commit updates our GitHub Actions CI workflow for the "build" job to specify the OS it's built-under in the name of the release uploaded.

I'm doing this because we now have two linux builds (x86_64 and aarch64 for arm), and the arm build failed saying a release with that name already exists. So I guess we need distinct names to prevent that error.

It's a bit more complicated because we use a matrix to duplicate the same build, which means I can't just write the arch. So I'm using the "OS" variable from the matrix. Hopefully this works.

For more info, see:

 * #40 (comment)

Author: maltfield

.github/workflows/build.yml

@@ -44,7 +44,7 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
         tag_name: ${{ github.run_id }}_linux
-        release_name: 'Public Build Artifact: Linux ${{ github.run_id }}'
+        release_name: 'Public Build Artifact: Linux ${{matrix.os}} ${{ github.run_id }}'
         draft: false
         prerelease: true