Set kim-api version to 2.3.0 in GH CI

Author: mjwen

.github/workflows/publish.yml

@@ -20,7 +20,7 @@ jobs:
           cache-environment: true
           create-args: >-
             python=3.10
-            kim-api=2.4.1
+            kim-api=2.3.0
 
       - name: Install dependencies
         shell: bash -el {0}

.github/workflows/testing.yml

@@ -22,7 +22,7 @@ jobs:
           cache-environment: true
           create-args: >-
             python=${{ matrix.python-version }}
-            kim-api=2.4.1
+            kim-api=2.3.0
 
       - name: Install KIM model
         shell: bash -el {0}