Suppress error message on `git describe` failure

Signed-off-by: RD WebDesign <github@rdwebdesign.com.br>

advanced/Scripts/piholeDebug.sh

@@ -202,7 +202,7 @@ compare_local_version_to_git_version() {
         if git status &> /dev/null; then
             # The current version the user is on
             local local_version
-            local_version=$(git describe --tags --abbrev=0);
+            local_version=$(git describe --tags --abbrev=0 2>&1);
             # What branch they are on
             local local_branch
             local_branch=$(git rev-parse --abbrev-ref HEAD);