Set fish trace local

Avoid tracing built-in fish functions, like cd for instance.

ci/ci-job-run.fish

@@ -1,7 +1,7 @@
 #!/usr/bin/fish
 # Job script for continuous integration
 # Please rename to : WebLand.run
-set fish_trace 1
+set -l fish_trace 1
 
 git clone --depth 1 https://gogs.jovian-hersemeule.eu/DricomDragon/WebLand.git repo
 

ci/install-web-files.fish

@@ -1,6 +1,6 @@
 #!/usr/bin/fish
 # Aim at deploying on local httpd server
-set fish_trace 1
+set -l fish_trace 1
 
 # Check existence of deployment target
 if not set -q WEBLAND_WEB_DEPLOY_PATH