Try new conformance suite version

Author: cicnavi

.github/workflows/test.yaml

@@ -223,7 +223,7 @@ jobs:
         ssp-composer-version: ["v2.5.3.1"]
     env:
       SUITE_BASE_URL: https://localhost.emobix.co.uk:8443
-      VERSION: release-v5.1.45
+      VERSION: release-v5.3.1
     steps:
       - uses: actions/checkout@v6
         with:

docs/5-oidc-conformance.md

@@ -17,7 +17,7 @@ Clone, build, and run the conformance test suite:
 ```bash
 git clone https://gitlab.com/openid/conformance-suite.git
 cd conformance-suite
-git checkout release-v5.1.45
+git checkout release-v5.3.1
 MAVEN_CACHE=./m2 docker compose -f builder-compose.yml run builder
 docker compose up
 ```