GH-329 - Make integration builds only check Boot 3.2 compatibility.

As we now rely on API that has been introduced in Spring Framework 6.1 RC1.

Author: odrotbohm

.github/workflows/integration.yaml

@@ -10,7 +10,6 @@ jobs:
     strategy:
       matrix:
         version:
-        - '3.1.4-SNAPSHOT'
         - '3.2.0-SNAPSHOT'
     name: Build against Boot ${{ matrix.version }}
     runs-on: ubuntu-latest