Fix issue when dowloading branch of not "hestiacp" owned branch

Author: jaapmarcus

bin/v-update-sys-hestia-git

@@ -109,7 +109,7 @@ else
 fi
 
 if [ ! -z "$2" ]; then
-    branch_check=$(curl -s --head -w %{http_code} https://raw.githubusercontent.com/hestiacp/hestiacp/$branch/src/deb/hestia/control -o /dev/null)
+    branch_check=$(curl -s --head -w %{http_code} https://raw.githubusercontent.com/$fork/hestiacp/$branch/src/deb/hestia/control -o /dev/null)
     if [ $branch_check -ne "200" ]; then
         echo "ERROR: invalid branch name specified."
         exit 1