Bump codecov/codecov-action from 5.5.5 to 7.0.0

Squashed PR #18 after verifying successful checks.

Author: dependabot[bot]

.github/workflows/maven.yml

@@ -72,7 +72,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: matrix.java == '21'
-        uses: codecov/codecov-action@0fb7174895f61a3b6b78fc075e0cd60383518dac # v5
+        uses: codecov/codecov-action@fb8b3582c8e4def4969c97caa2f19720cb33a72f # v7.0.0
         with:
           files: target/site/jacoco/jacoco.xml
           fail_ci_if_error: false