updated codecov badge

[bashir2]

Description of what I changed

Now that we have enabled codecov again, we should update the old badge too.

E2E test

TESTED:

Verified the links.

Checklist: I completed these to help reviewers :)

• [x] I have read and will follow the review process.

• [x] I am familiar with Google Style Guides for the language I have coded in.

  No? Please take some time and review Java and Python style guides.

• [x] My IDE is configured to follow the Google code styles.

  No? Unsure? -> configure your IDE.

• [ ] I have added tests to cover my changes. (If you refactored existing code that was well tested you do not have to add tests)

• [x] I ran mvn clean package right before creating this pull request and added all formatting changes to my commit.

• [x] All new and existing tests passed.

• [x] My pull request is based on the latest changes of the master branch.

  No? Unsure? -> execute command git pull --rebase upstream master

[bashir2]

@chandrashekar-s please feel free to merge this once you reviewed it.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 50.10%. Comparing base (aa769f0) to head (172ae3d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #979 +/- ## ============================================ - Coverage 50.16% 50.10% -0.06% + Complexity 606 605 -1 ============================================ Files 86 86 Lines 5073 5073 Branches 632 632 ============================================ - Hits 2545 2542 -3 - Misses 2282 2285 +3 Partials 246 246 ```

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