Add apt repository 'universe' for libtinfo5

Author: dtolnay

Diff for: .github/workflows/bindgen.yml

@@ -196,8 +196,9 @@ jobs:
       - name: Install libtinfo
         if: matrix.os == 'ubuntu-latest'
         run: |
+          sudo add-apt-repository universe
           sudo apt-get update
-          sudo apt-get install libtinfo6
+          sudo apt-get install libtinfo5
       - name: Run all the tests
         env:
           GITHUB_ACTIONS_OS: ${{matrix.os}}