Update modeling_parler_tts.py

[eltociear]

coexistance -> coexistence

[evdcush]

FYI this user makes trivial diffs in any trending or recently public/released repo related to AI on github (e.g. "Huggingface" --> "Hugging Face", "Github" --> "GitHub") to feature in the contributors. 🥸

See:

• https://github.com/ID-Animator/ID-Animator/pull/1
• https://github.com/nus-apr/auto-code-rover/pull/4
• https://github.com/nus-apr/auto-code-rover/pull/14
• https://github.com/cohere-ai/cohere-toolkit/pull/56
• https://github.com/meta-llama/llama3/pull/57
• https://github.com/infiniflow/ragflow/pull/223
• https://github.com/LlamaFamily/Llama-Chinese/pull/317
• https://github.com/langchain-ai/langchain/pull/19846
• https://github.com/anthropics/anthropic-cookbook/pull/33
• https://github.com/SmartFlowAI/EmoLLM/pull/176
• https://github.com/agiresearch/AIOS/pull/15
• https://github.com/princeton-nlp/SWE-agent/pull/19