Bump mev-boost to stable v1.9

Author: KaloyanTanev

docker-compose.yml

@@ -142,7 +142,7 @@ services:
   #  | | | | | |  __/\ V /_____| |_) | (_) | (_) \__ \ |_
   #  |_| |_| |_|\___| \_/      |_.__/ \___/ \___/|___/\__|
   mev-boost:
-    image: ${MEVBOOST_IMAGE:-flashbots/mev-boost}:${MEVBOOST_VERSION:-1.9rc3}
+    image: ${MEVBOOST_IMAGE:-flashbots/mev-boost}:${MEVBOOST_VERSION:-1.9}
     command: |
       -${NETWORK}
       -loglevel=debug