Update docs/pos/get-started/becoming-a-validator.md

Co-authored-by: Dra Murphy <149679879+kmurphypolygon@users.noreply.github.com>

Author: hsutaiyu

docs/pos/get-started/becoming-a-validator.md

@@ -55,7 +55,6 @@ Bor is the Block producer node and layer for the Polygon Network. It is based on
     * GitHub repository: [Bor](https://github.com/maticnetwork/bor)
     * Blog post: [Heimdall and Bor](https://blog.polygon.technology/heimdall-and-bor/)
 
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 ## Validator responsibilities
 
 !!!tip "Stay in the know"