Fix: [AEA-0000] - Updated github action cache version to v4 (#213)

## Summary
- Routine Change

.github/workflows/regression_tests.yml

@@ -69,7 +69,7 @@ jobs:
         uses: asdf-vm/actions/setup@05e0d2ed97b598bfce82fd30daf324ae0c4570e6
 
       - name: Cache asdf
-        uses: actions/cache@a2ed59d39b352305bdd2f628719a53b2cc4f9613
+        uses: actions/cache@v4
         with:
           path: |
             ~/.asdf
@@ -83,7 +83,7 @@ jobs:
           PYTHON_CONFIGURE_OPTS: --enable-shared
 
       - name: Cache Virtualenv
-        uses: actions/cache@a2ed59d39b352305bdd2f628719a53b2cc4f9613
+        uses: actions/cache@v4
         id: cache-venv
         with:
           path: .venv
@@ -163,7 +163,7 @@ jobs:
           repositories: "electronic-prescription-service-api-regression-tests,eps-test-reports"
 
       - name: Report failure on test failure
-        if: steps.tests.outcome != 'success' || ( steps.sha1_tests.outcome != 'success' && steps.sha1_tests.outcome != 'skipped' ) 
+        if: steps.tests.outcome != 'success' || ( steps.sha1_tests.outcome != 'success' && steps.sha1_tests.outcome != 'skipped' )
         run: |
           poetry run python scripts/send_test_results.py --token=${{ steps.generate-token.outputs.token }} --run_id ${{GITHUB.RUN_ID}}
           echo The regression tests step failed, this likely means there are test failures.