Upload build files from matrix in releases (#17)

The matrix build produces sub dirs for each target combination and puts
built files inside.

Author: shsms

.github/workflows/ci.yaml

@@ -325,7 +325,7 @@ jobs:
             --generate-notes \
             $extra_opts \
             $REF_NAME \
-            dist/*
+            dist/dist-packages-*/*
         env:
           REF_NAME: ${{ github.ref_name }}
           REPOSITORY: ${{ github.repository }}