ci: disable fail-fast for E2E test matrix

Set fail-fast to false to allow all E2E test jobs on multiple OS
architectures to run to completion, improving visibility of failures
across ubuntu-latest and ubuntu-24.04-arm environments.

Author: koki-develop

.github/workflows/ci.yml

@@ -55,6 +55,7 @@ jobs:
     name: E2E Test
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-latest, ubuntu-24.04-arm]
     timeout-minutes: 15