ci: disable fail-fast for integration test matrix

Allow all matrix jobs to complete so we can see which contract
versions pass independently.

Author: douglance

.github/workflows/build-test.yml

@@ -161,6 +161,7 @@ jobs:
     name: Test (Integration) - ${{ matrix.config.name }}
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         config:
           - name: Nitro contracts v3.2 - Custom gas token with 18 decimals