update image link and docs title for section 11

Merge pull request #646 from mrdbourke/tf-cert-2024-update

update readme

update materials to reflect TensorFlow Developer Certificate closing

Delete section-4-unstructured-data-projects directory

update notebook with a bunch of annotations and code

fix broken notebook formatting

Merge pull request #595 from faisal-rasheed-lone/patch-1

Merge pull request #597 from mmaksi/main

The predict function must take X_test not y_test

02_neural_network_classification_in_tensorflow.ipynb

Merge pull request #591 from sithu-khant/main

fixed `lr` to `learning_rate`

fixed `lr` to `learning_rate`

Delete docs/02_neural_network_classification_in_tensorflow.ipynb