Don't upload multiple times to same artifact in build workflow

The "build" workflow produces binaries for a range of target hosts. This is done by using a job matrix in the GitHub
Actions workflow that produces each build in a parallel job. GitHub Actions workflow artifacts are used to transfer the
generated files between sequential jobs in the workflow. The "actions/upload-artifact" action is used for this purpose.

Previously, a single artifact was used for this purpose, with each of the parallel jobs uploading its own generated
files to that artifact. However, support for uploading multiple times to a single artifact was dropped in version 4.0.0
of the "actions/upload-artifact" action. So it is now necessary to use a dedicated artifact for each of the builds.
These can be downloaded in aggregate by using the artifact name globbing and merging features which were introduced in
version 4.1.0 of the "actions/download-artifact" action.

Author: per1234

.github/workflows/build.yml

@@ -11,6 +11,9 @@ on:
     branches:
       - main
 
+env:
+  ARTIFACT_PREFIX: dist-
+
 jobs:
 
   build:
@@ -20,13 +23,16 @@ jobs:
     strategy:
       matrix:
         config:
-          - os: ubuntu-latest
+          - artifact-suffix: Linux_64bit
+            os: ubuntu-latest
             ExecutableSuffix: ''
             Exports: ''
-          - os: macos-latest
+          - artifact-suffix: macOS_ARM64
+            os: macos-latest
             ExecutableSuffix: ''
             Exports: 'CGO_ENABLED=1 MACOSX_DEPLOYMENT_TARGET=10.14 '
-          - os: windows-2019
+          - artifact-suffix: Windows_64bit
+            os: windows-2019
             ExecutableSuffix: '.exe'
             Exports: ''
     runs-on: ${{ matrix.config.os }}
@@ -50,7 +56,7 @@ jobs:
       - name: Upload Workflow Artifact [GitHub Actions]
         uses: actions/upload-artifact@v4
         with:
-          name: build-artifacts
+          name: ${{ env.ARTIFACT_PREFIX }}${{ matrix.config.artifact-suffix }}
           # this makes the artifact a .zip of the .zip archive, which is currently necessary to preserve the executable file permissions
           # see: https://github.com/actions/upload-artifact/issues/38
           path: ${{ env.BUILD_OUTPUT_DIRECTORY }}/archive/${{ env.EXECUTABLE_NAME }}_${{ runner.OS }}_amd64.zip
@@ -63,7 +69,8 @@ jobs:
       - name: Download Workflow Artifact [GitHub Actions]
         uses: actions/download-artifact@v4
         with:
-          name: build-artifacts
+          pattern: ${{ env.ARTIFACT_PREFIX }}*
+          merge-multiple: true
           path: build-artifacts
 
       - name: Publish Nightly [S3]