Fix typo: 'seperator' to 'separator' in variable names (#40389)
Fixed 4 instances of the typo "seperator" → "separator" in variable names:
- 2 instances in src/transformers/models/shieldgemma2/convert_shieldgemma2_weights_orbax_to_hf.py
- 2 instances in src/transformers/models/gemma3/convert_gemma3_weights_orbax_to_hf.py
These typos were in variable names used for parsing path components in weight conversion scripts.
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Co-authored-by: Claude <noreply@anthropic.com>