ci: Check pango 1.56 feature on the CI

Author: sdroege

.github/workflows/CI.yml

@@ -25,7 +25,7 @@ jobs:
           - { name: "gio", features: "v2_84", nightly: "--all-features", test_sys: true }
           - { name: "glib", features: "v2_84,log", nightly: "--all-features", test_sys: true }
           - { name: "graphene", features: "", nightly: "", test_sys: true }
-          - { name: "pango", features: "v1_54", nightly: "--all-features", test_sys: true }
+          - { name: "pango", features: "v1_56", nightly: "--all-features", test_sys: true }
           - { name: "pangocairo", features: "", nightly: "--all-features", test_sys: true }
     steps:
       - uses: actions/checkout@v4