Update run_unittests.yaml

Author: michaelbeale-IL

.github/workflows/run_unittests.yaml

@@ -29,7 +29,7 @@ jobs:
           python-version: "3.12"
 
       - name: Cache Python virtual environment
-        uses: actions/cache@v4.0.2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pypoetry/virtualenvs
           key: ${{ runner.os }}-python-${{ hashFiles('**/poetry.lock') }}