Fix typo in Dockerfile comment for model recommendation

Okay, this was driving my OCD crazy.

Corrected a spelling error in the Dockerfile's comment section to enhance documentation clarity. The typo 'persormance' was updated to 'performance,' ensuring accurate guidance on using multilingual sentence transformer models for better performance and language support.

Dockerfile

@@ -52,7 +52,7 @@ ENV WHISPER_MODEL="base" \
 ## RAG Embedding Model Settings ##
 # any sentence transformer model; models to use can be found at https://huggingface.co/models?library=sentence-transformers
 # Leaderboard: https://huggingface.co/spaces/mteb/leaderboard 
-# for better persormance and multilangauge support use "intfloat/multilingual-e5-large" (~2.5GB) or "intfloat/multilingual-e5-base" (~1.5GB)
+# for better performance and multilangauge support use "intfloat/multilingual-e5-large" (~2.5GB) or "intfloat/multilingual-e5-base" (~1.5GB)
 # IMPORTANT: If you change the default model (all-MiniLM-L6-v2) and vice versa, you aren't able to use RAG Chat with your previous documents loaded in the WebUI! You need to re-embed them.
 ENV RAG_EMBEDDING_MODEL="all-MiniLM-L6-v2" \
     RAG_EMBEDDING_MODEL_DIR="/app/backend/data/cache/embedding/models" \