.github: Disable debug output for image-changes

The "set -x" bash debug output is very noisy and one doesn't even see
the actual output in this noise.

Author: pothos

.github/workflows/image_changes.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -x
+#set -x
 set -euo pipefail
 
 source ci-automation/image_changes.sh