workflows: Install missing setuptools-scm for release

Forgotten in commit ba4163f.

Author: martinpitt

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y python3-setuptools
+          sudo apt-get install -y python3-setuptools python3-setuptools-scm
 
       - name: Build release tarball
         run: ./setup.py sdist