Update README.md

Author: codelion

optillm/plugins/spl/README.md

@@ -83,6 +83,7 @@ client.chat.completions.create(
 3. **System Prompt Augmentation**: Selected strategies (up to MAX_STRATEGIES_FOR_INFERENCE) are added to the system prompt
 
 When learning mode is enabled, the plugin also performs:
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 4. **Effectiveness Evaluation**: After generating a response, the system evaluates how well each strategy worked
 5. **Strategy Creation & Refinement**: The system creates new strategies for unseen problem types and periodically refines existing strategies based on usage