Minor tweak to worker setup

[skip ci]

Author: hvr

worker-setup/base.Dockerfile

@@ -118,7 +118,7 @@ RUN apt-get install -y \
     && apt-get autoremove -y --purge && apt-get clean
 
 # recheck for updated dists
-RUN echo 1 && apt-get update && apt-get dist-upgrade -y
+RUN echo 2 && apt-get update && apt-get dist-upgrade -y
 
 # 2nd iteration
 RUN apt-get install -y \

worker-setup/worker.conf

@@ -20,4 +20,4 @@ compiler-exe:
   * "/opt/ghc/8.0.2/bin/xghc"
   * "/opt/ghc/8.2.2/bin/xghc"
   * "/opt/ghc/8.4.4/bin/xghc"
-  * "/opt/ghc/8.6.3/bin/xghc"
+  * "/opt/ghc/8.6.5/bin/xghc"