functions: theme: Fix rsync chmod

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: jcormier

assets/runtime/functions

@@ -1185,7 +1185,7 @@ install_plugins() {
 install_themes() {
   if [[ -d ${REDMINE_THEMES_DIR} && -n "$(ls -A ${REDMINE_THEMES_DIR})" ]]; then
     echo "Installing themes..."
-    rsync -avq --chown=${REDMINE_USER}:${REDMINE_USER} --chmod=644 ${REDMINE_THEMES_DIR}/ ${REDMINE_INSTALL_DIR}/themes/
+    rsync -avq --chown=${REDMINE_USER}:${REDMINE_USER} --chmod=Du=rwx,Dgo=rx,Fu=rw,Fgo=r ${REDMINE_THEMES_DIR}/ ${REDMINE_INSTALL_DIR}/themes/
     # if themes are installed, we need to precompile assets
     echo "Precompiling assets. Please be patient, this could take a while..."
     execute_raketask assets:precompile