Update CI matrix to exclude specific Python version

Exclude Python 3.10 with the Brian2 engine from the CI matrix.

Author: pgleeson

.github/workflows/omv-ci.yml

@@ -18,6 +18,9 @@ jobs:
       matrix:
         python-version: [ "3.10", "3.12", "3.13" ]
         engine: [ jNeuroML_validate, Brian2 ]
+        exclude:
+          - python-version: "3.10"
+            engine: Brian2
 
     steps:
     - uses: actions/checkout@v6