Fix typo in documentation

[jdgsmallwood]

Fix typo in documentation.

Description

This corrects RecordEpisodicStatistics to RecordEpisodeStatistics in the documentation.

Type of change

Please delete options that are not relevant.

• [ x] Documentation only change (no code changed)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Kallinteris-Andreas]

For reference

Gymnasium/gymnasium/wrappers/common.py

Line 437 in ac1e744

class RecordEpisodeStatistics(

[pseudo-rnd-thoughts]

Thanks for spotting that