Update example screenshots

sh/generate_example_screenshots.sh

@@ -6,6 +6,8 @@ script_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
 cd "$script_path/.."
 
 cd examples
-for VARIABLE in $(ls -1d */ | sed 's/\/$//'); do
-    EFRAME_SCREENSHOT_TO="$VARIABLE/screenshot.png" cargo run -p $VARIABLE
+for EXAMPLE_NAME in $(ls -1d */ | sed 's/\/$//'); do
+    if [ ${EXAMPLE_NAME} != "hello_world_par" ]; then
+        EFRAME_SCREENSHOT_TO="$EXAMPLE_NAME/screenshot.png" cargo run -p $EXAMPLE_NAME
+    fi
 done