update README

README.md

@@ -38,15 +38,5 @@ The official documentation is hosted on Read the Docs: [https://dendrite.readthe
 
 ## See also the BDP ecosystem
 
-- [``brainstate``](https://github.com/chaoming0625/brainstate): A ``State``-based transformation system for brain dynamics programming.
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-- [``brainunit``](https://github.com/chaoming0625/brainunit): Physical units and unit-aware mathematical system in JAX for brain dynamics and AI4Science.
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-- [``braintaichi``](https://github.com/chaoming0625/braintaichi): Leveraging Taichi Lang to customize brain dynamics operators.
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-- [``brainscale``](https://github.com/chaoming0625/brainscale): The scalable online learning framework for biological neural networks.
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-- [``dendritex``](https://github.com/chaoming0625/dendritex): The dendritic modeling in JAX.
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-- [``braintools``](https://github.com/chaoming0625/braintools): The toolbox for the brain dynamics simulation, training and analysis.
+We are building the BDP ecosystem: https://ecosystem-for-brain-dynamics.readthedocs.io/