Describe how to generate class diagram.

Add a comment to the markdown to explain how the class diagram was
generated, so that it can be updated as more teleprompters are added.

Author: rpgoldman

docs/docs/building-blocks/6-optimizers.md

@@ -32,6 +32,11 @@ In many cases, we found that compiling leads to better prompts than human writin
 
 ## What DSPy Optimizers are currently available?
 
+<!-- The following diagram was generated by: -->
+<!-- 1. Running symilar on the teleprompter module to extract the python hierarchy as a Graphviz dot file -->
+<!-- 2. Hand-editing the resulting dot file to remove classes that are not teleprompters/optimizers (e.g., classes for data structures manipulated by optimizers). -->
+<!-- 3. Using dot to compile the `.dot` file into a PNG -->
+
 [Subclasses of Teleprompter](figures/teleprompter-classes.png)
 
 All of these can be accessed via `from dspy.teleprompt import *`.