discourse update: use latest-release tag instead of detecting the latest tag

updates/discourse.sh

@@ -24,11 +24,12 @@ nodever=$(curl -s https://raw.githubusercontent.com/discourse/discourse_docker/m
 
 cd $basedir
 
-git fetch -q
-
 # attempting not having to use a patchfile
 git stash
-git checkout $(git tag -l | grep -v 'rc[0-9]*$' | sort -V | tail -n 1)
+# lets roll with their doctor scripts command
+git fetch --tags --prune-tags --prune --force origin
+git checkout latest-release # they seem to update this tag, not sure if we need to checkout
+#git pull
 git stash apply
 
 # failsafe if stash apply causes too much trouble