chore(deps): update codecov/codecov-action action to v4

Author: renovate[bot]

.github/workflows/main.yml

@@ -13,4 +13,4 @@ jobs:
           cache: yarn
       - run: yarn install --frozen-lockfile
       - run: yarn test
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4

.github/workflows/vue-2.yml

@@ -14,4 +14,4 @@ jobs:
       - run: yarn install
       - run: yarn add --dev vue@2 vuex@3 @vue/test-utils@1
       - run: yarn test
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4