Update codecov-action

This fixes the error: ``` Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20. ```
a13xp0p0v · Mar 9, 2024 · 0c0cf89 · 0c0cf89
1 parent 6f3214d
commit 0c0cf89
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/.github/workflows/engine_unit-test.yml b/.github/workflows/engine_unit-test.yml
@@ -38,7 +38,7 @@ jobs:
         coverage xml -i -o coverage_unittest.xml
 
     - name: Handle coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         files: ./coverage_unittest.xml
         flags: engine_unit-test

diff --git a/.github/workflows/functional_test.yml b/.github/workflows/functional_test.yml
@@ -61,7 +61,7 @@ jobs:
         coverage xml -i -o coverage.xml
 
     - name: Handle coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         files: ./coverage.xml
         flags: functional_test