Remove outdated refs to build matrix

Author: jl-wynen

.github/workflows/release.yml

@@ -11,7 +11,7 @@ defaults:
 
 jobs:
   build_conda:
-    name: Conda package build (${{ matrix.variant.target }}, py${{ matrix.python-version }})
+    name: Conda package build
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
@@ -32,7 +32,7 @@ jobs:
 
       - uses: actions/upload-artifact@v2
         with:
-          name: conda-package-${{ matrix.variant.os }}-py${{ matrix.python-version }}
+          name: conda-package
           path: conda/package/noarch/scippneutron*.tar.bz2
 
   build_sdist: