docs: another sable diagram caption fix

mava/systems/sable/README.md

@@ -16,13 +16,8 @@ For an overview of how the algorithm works, please see the diagram below. For a
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-*Sable architecture and execution.* The encoder receives all agent observations
-$o_t^1,\dots,o_t^N$ from the current timestep $t$ along with a hidden state
-$h_{t-1}^{\text{enc}}$ representing past timesteps and produces encoded observations
-$\hat{o}_t^1,\dots,\hat{o}_t^N$, observation-values $v(\hat{o}_t^1),\dots,v(\hat{o}_t^N)$,
-and a new hidden state $h_t^{\text{enc}}$.
-The decoder performs recurrent retention over the current action $a_t^{m-1}$, followed by cross attention with the encoded observations, producing the next action $a_t^m$. The initial hidden states for recurrence over agents in the decoder at the current timestep are
-$(h_{t-1}^{\text{dec}_1},h_{t-1}^{\text{dec}_2})$, and by the end of the decoding process, it generates the updated hidden states $(h_t^{\text{dec}_1},h_t^{\text{dec}_2})$.
+*Sable architecture and execution.* The encoder receives all agent observations $o_t^1,\dots,o_t^N$ from the current timestep $t$ along with a hidden state $h_{t-1}^{\text{enc}}$ representing past timesteps and produces encoded observations $\hat{o}_t^1,\dots,\hat{o}_t^N$, observation-values $v(\hat{o}_t^1),\dots,v(\hat{o}_t^N)$, and a new hidden state $h_t^{\text{enc}}$.
+The decoder performs recurrent retention over the current action $a_t^{m-1}$, followed by cross attention with the encoded observations, producing the next action $a_t^m$. The initial hidden states for recurrence over agents in the decoder at the current timestep are $(h_{t-1}^{\text{dec}_1},h_{t-1}^{\text{dec}_2})$, and by the end of the decoding process, it generates the updated hidden states $(h_t^{\text{dec}_1},h_t^{\text{dec}_2})$.
 
 ## Relevant paper:
 * [Performant, Memory Efficient and Scalable Multi-Agent Reinforcement Learning](https://arxiv.org/pdf/2410.01706)