Update agglayer.md

Fix credit box

Author: hsutaiyu

docs/learn/agglayer.md

@@ -242,7 +242,9 @@ The AggLayer will allow a single ZK proof to verify state across all chains in t
 
 !!! credits
 
-    The contents of this document were initially sourced from blog post [the HackMD post]https://hackmd.io/@QOKsDTFRSd-1oYqrNQ3fIA/Hkx9X3jah originally written by Brendan Farmer, Co-founder @ Polygon on Oct 2023, and updated using a more recently blog post [the Mirror post] https://mirror.xyz/0xfa892B19c72c2D2C6B10dFce8Ff8E7a955b58A61/TXMyZhhRFa-bjr7YHwmJpKBwt2-_ysirbh_VpNy3qZY with additional details.
+    The contents of this document have been sourced from blog posts originally written by Brendan Farmer, Co-founder @ Polygon.
+    * [The original blog post](https://hackmd.io/@QOKsDTFRSd-1oYqrNQ3fIA/Hkx9X3jah) made on October 2023
+    * A more recently [updated blog post](https://mirror.xyz/0xfa892B19c72c2D2C6B10dFce8Ff8E7a955b58A61/TXMyZhhRFa-bjr7YHwmJpKBwt2-_ysirbh_VpNy3qZY) with additional details.