docs: update supported models list (add gpt-5.2/5.3-codex, spark, claude-sonnet-4.6)

Author: Sixzero

README.md

@@ -76,9 +76,9 @@ systemctl --user status cliproxyapi.service
 
 ## Supported Models
 
-**Anthropic:** claude-opus-4.6, claude-opus-4.5, claude-sonnet-4.5, claude-haiku-4.5, claude-opus-4.1, claude-opus-4, claude-sonnet-4, claude-3.7-sonnet, claude-3.5-haiku
+**Anthropic:** claude-opus-4.6, claude-sonnet-4.6, claude-opus-4.5, claude-sonnet-4.5, claude-haiku-4.5, claude-opus-4.1, claude-opus-4, claude-sonnet-4, claude-3.7-sonnet, claude-3.5-haiku
 
-**OpenAI:** gpt-5, gpt-5.1, gpt-5.2, gpt-5-codex, gpt-5.1-codex, gpt-5.1-codex-mini, gpt-5.1-codex-max
+**OpenAI:** gpt-5, gpt-5.1, gpt-5.2, gpt-5-codex, gpt-5.1-codex, gpt-5.1-codex-mini, gpt-5.1-codex-max, gpt-5.2-codex, gpt-5.3-codex, gpt-5.3-codex-spark
 
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