cirrusci: update to FreeBSD 12.2

This fixes CI failure because FreeBSD 12.1 became EOL in Jan 2021
(3 months after release of 12.2): https://www.freebsd.org/security/#sup

.cirrus.yml

@@ -1,5 +1,5 @@
 freebsd_instance:
-  image: freebsd-12-1-release-amd64
+  image: freebsd-12-2-release-amd64
 
 build_task:
   env:
@@ -10,6 +10,7 @@ build_task:
     folder: /var/cache/pkg
 
   install_script:
+  #  - pkg update
     - pkg install -y postgresql95-client ghc hs-cabal-install jq git
 
   # cache the hackage index file and downloads which are
@@ -67,4 +68,4 @@ build_task:
           -H "Authorization:token $TOKEN" \
           -H "Content-Type:application/octet-stream" \
           "https://uploads.github.com/repos/$CIRRUS_REPO_FULL_NAME/releases/$release_id/assets?name=$bin_name"
-      fi
+      fi