Update notice file workflow to work even if the file doesn't exist yet

tools/notice_generation.sh

@@ -35,7 +35,7 @@ NOTICE_FILENAME="NOTICE"
 echo "Running cargo-about for NOTICE file generation..."
 cargo about generate --workspace devops/cg/about.hbs --config devops/cg/about.toml | sed -E 's/[ \t]+\r?$//' > $NOTICE_FILENAME
 
-if [ -z "$(git diff --name-only $NOTICE_FILENAME)" ]
+if [ -z "$(git diff --name-only $NOTICE_FILENAME)" ] && [ -z "$(git ls-files --others --exclude-standard)"]
 then
       echo "File not changed"
 else