Update Github token reference

[0xnm]

What does this PR do?

Service account repo cannot access ci.dd-sdk-android.* namespace, so updating to the repo-specific namespace.

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• [ ] Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

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

Project coverage is 78.12%. Comparing base (96a89fa) to head (76ee187).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #282 +/- ## ============================================= - Coverage 78.23% 78.12% -0.11% Complexity 251 251 ============================================= Files 31 31 Lines 914 914 Branches 114 114 ============================================= - Hits 715 714 -1 - Misses 147 148 +1 Partials 52 52 ``` [see 1 file with indirect coverage changes](https://app.codecov.io/gh/DataDog/dd-sdk-android-gradle-plugin/pull/282/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog)