Update TUTORIALS_REF

Author: MakisH

tools/tests/reference_versions.yaml

@@ -4,7 +4,7 @@ OPENFOAM_EXECUTABLE: "openfoam2312"
 OPENFOAM_ADAPTER_REF: "v1.3.1"
 PYTHON_BINDINGS_REF: "v3.2.0"
 FENICS_ADAPTER_REF: "v2.2.0"
-TUTORIALS_REF: "abce5fee2ec7593628e552b6b0296f5953a808b2" # May 27, 2026
+TUTORIALS_REF: "ab8eaceb42daebc6c4d7d8864c25997f983522e5" # May 27, 2026
 PLATFORM: "ubuntu_2404"
 CALCULIX_VERSION: "2.20"
 CALCULIX_ADAPTER_REF: "v2.20.1"