Update agglayer.md

Rewording the opening paragraph

Author: 0xgraciegrace

docs/learn/agglayer.md

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 # Aggregation layer
 
-Polygon 2.0 envisions a protocol layer that seamlessly connects any ZK-enabled L2 or L1 chain. This layer of interoperability is referred to as the **aggregation layer**, or **AggLayer**.
+Solving the scalability problem in blockchains means scaling access to shared state and liquidity across many chains. To do so requires a new approach to blockchain architecture, namely, aggregated blockchains. Polygon Labs researchers and engineers have designed a solution–the **aggregation layer**, or **AggLayer**–which will seamlessly connect any ZK-enabled L2 or L1 chain.
 
 In this document, we look at: