removed unnecessary images and updated colab link

recipes/quickstart/build_with_Llama_3_2.ipynb

recipes/quickstart/images/1_llama_guard.png

recipes/quickstart/images/2_prompt_guard.png

recipes/quickstart/images/3_codeshield.png

recipes/quickstart/images/4_cyberseceval.png

recipes/quickstart/images/design.png

recipes/quickstart/images/llamaguard_example.png

recipes/quickstart/images/system_level_safety.png

recipes/quickstart/images/system_level_safety_small.png

recipes/quickstart/images/varun-linkedin.png

recipes/quickstart/images/varunfb-github.png