test: add Ubuntu 26.04 to example-basic workflow (cypress-io#1791)

Author: MikeMcC399

.github/workflows/example-basic.yml

@@ -23,6 +23,7 @@ jobs:
         os:
           - ubuntu-22.04
           - ubuntu-24.04
+          - ubuntu-26.04
           - windows-2025
           - macos-26
           - macos-26-intel
@@ -50,6 +51,7 @@ jobs:
         os:
           - ubuntu-22.04
           - ubuntu-24.04
+          - ubuntu-26.04
           - windows-2025
           - macos-26
           - macos-26-intel