fix(lib): prevent filename collision

[jeertmans]

Apparently, ManimCE can produce two different animations with the same name (i.e., the same hash). As documented, ManimGL would anyway produce files with the same name, so this fix was needed.

Closes #428

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.30%. Comparing base (962ff2b) to head (818f66b).
Report is 1 commits behind head on main.

❗ Current head 818f66b differs from pull request most recent head 19c74f6

Please upload reports for the commit 19c74f6 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #429      +/-   ##
==========================================
- Coverage   79.33%   79.30%   -0.04%     
==========================================
  Files          22       22              
  Lines        1815     1822       +7     
==========================================
+ Hits         1440     1445       +5     
- Misses        375      377       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.