Bump go.mod to 1.24 in the go.mod

Bumping to 1.25 will create a whole lot of trouble and 1.24 should
trigger the Fprintf go vet changes.

Author: cbosdo

go.mod

@@ -1,6 +1,6 @@
 module github.com/uyuni-project/uyuni-tools
 
-go 1.21
+go 1.24
 
 require (
 	github.com/Netflix/go-expect v0.0.0-20220104043353-73e0943537d2

update-copyright-year.sh

@@ -9,6 +9,9 @@ changed="n"
 current_year=$(date +%Y)
 for changed_file in $@; do
     case "$changed_file" in
+        go.mod|go.sum)
+            continue
+            ;;
         # Changelogs
         uyuni-tools.changes*)
             continue