Update projects-2.12.md

Author: SethTisue

projects-2.12.md

@@ -79,7 +79,7 @@ Add in sbt using `libraryDependencies += ...`:
     "com.typesafe.akka"                %% "akka-stream"               % "2.4.12"
     "com.typesafe.akka"                %% "akka-http-core"            % "10.0.0"
     "com.typesafe.akka"                %% "akka-http"                 % "10.0.0"
-    "com.typesafe.slick"               %% "slick"                     % "3.2.0-M2"
+    "com.typesafe.slick"               %% "slick"                     % "3.2.0-RC1"
     "com.wix"                          %% "accord-core"               % "0.6"
     "eu.timepit"                       %% "refined"                   % "0.6.0"
     "eu.unicredit"                     %% "shocon"                    % "0.1.4"