Update codecov/codecov-action to v4 (#5100)

Author: vil02

.github/workflows/build.yml

@@ -1,9 +1,6 @@
 name: Build
 on: [push, pull_request]
 
-env:
-  COVERAGE_REPORT_PATH: "target/site/jacoco/jacoco.xml"
-
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -16,8 +13,19 @@ jobs:
           distribution: 'adopt'
       - name: Build with Maven
         run: mvn --batch-mode --update-snapshots verify
-      - name: Upload coverage to codecov
-        uses: codecov/codecov-action@v3
+      - name: Upload coverage to codecov (tokenless)
+        if: >-
+          github.event_name == 'pull_request' &&
+          github.event.pull_request.head.repo.full_name != github.repository
+        uses: codecov/codecov-action@v4
+        with:
+          fail_ci_if_error: true
+      - name: Upload coverage to codecov (with token)
+        if: >
+          github.repository == 'TheAlgorithms/Java' &&
+          (github.event_name != 'pull_request' ||
+          github.event.pull_request.head.repo.full_name == github.repository)
+        uses: codecov/codecov-action@v4
         with:
-          files: "${{ env.REPORT_NAME }}"
+          token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true