chore: try limiting artifact upload concurrency

See actions/upload-artifact#623

Author: mhx

.github/workflows/build.yml

@@ -92,6 +92,8 @@ jobs:
           path: ${{ runner.temp }}\build\${{ env.binary_tarball }}
           if-no-files-found: error
           compression-level: 0
+        env:
+          ACTIONS_ARTIFACT_UPLOAD_CONCURRENCY: 5
         if: env.do_install == 'true'
 
       - name: Upload Universal Binary
@@ -101,6 +103,8 @@ jobs:
           path: ${{ runner.temp }}\build\${{ env.universal_binary }}
           if-no-files-found: error
           compression-level: 0
+        env:
+          ACTIONS_ARTIFACT_UPLOAD_CONCURRENCY: 5
         if: env.do_install == 'true'
 
   package-source:
@@ -377,6 +381,8 @@ jobs:
           path: ${{ runner.temp }}/artifacts/${{ env.binary_tarball }}
           if-no-files-found: error
           compression-level: 0
+        env:
+          ACTIONS_ARTIFACT_UPLOAD_CONCURRENCY: 5
         if: ${{ endsWith(matrix.build_type, '-static') }}
 
       - name: Upload Universal Binary
@@ -386,6 +392,8 @@ jobs:
           path: ${{ runner.temp }}/artifacts/${{ env.universal_binary }}
           if-no-files-found: error
           compression-level: 0
+        env:
+          ACTIONS_ARTIFACT_UPLOAD_CONCURRENCY: 5
         if: ${{ endsWith(matrix.build_type, '-static') }}
 
   macos: