Update http4s-circe, http4s-client, ... to 1.0.0-M43 in main

http4s-steward[bot] · http4s-steward[bot] · commit bd939c48bf99 · 2024-10-31T00:46:44.000Z
diff --git a/build.sbt b/build.sbt
@@ -18,7 +18,7 @@ inThisBuild(
   )
 )
 
-val http4sVersion = "1.0.0-M42"
+val http4sVersion = "1.0.0-M43"
 
 val jetty = "12.0.14"
 
