fix: remove extremely verbose "x" flag

The debug "x" flag that prints every command is really excessive.

build.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # Tell build process to exit if there are any errors.
-set -ouex pipefail
+set -oue pipefail
 
 # Add custom repos.
 repos=$(yq '.extrarepos[]' < /usr/etc/ublue-recipe.yml)

scripts/example.sh

@@ -3,7 +3,7 @@
 # Tell this script to exit if there are any errors.
 # You should have this in every custom script, to ensure that your completed
 # builds actually ran successfully without any errors!
-set -ouex pipefail
+set -oue pipefail
 
 # Your code goes here.
 echo 'This is an example shell script'