ci: fix tests failing as the token-authenticator's synapse dependency is already pointing to the master branch

[FrenchGithubUser]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.02%. Comparing base (5885478) to head (06bbaf7).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #226   +/-   ##
=======================================
  Coverage   80.01%   80.02%           
=======================================
  Files         498      498           
  Lines       70635    70635           
  Branches    10615    10615           
=======================================
+ Hits        56521    56524    +3     
+ Misses      10881    10880    -1     
+ Partials     3233     3231    -2     

see 2 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5885478...06bbaf7. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.