update workflow for docs + section 3 readme

.github/workflows/make_docs.yml

@@ -35,6 +35,7 @@ jobs:
       - run: cp communicating-your-work.md docs/
       - run: cp section-4-unstructured-data-projects/end-to-end-dog-vision-v2.ipynb docs/
       - run: cp section-3-structured-data-projects/end-to-end-heart-disease-classification.ipynb docs/ 
+      - run: cp section-3-structured-data-projects/end-to-end-bluebook-bulldozer-price-regression-v2.ipynb docs/
       - run: cp images/* docs/images/
 
       # Last step to deploy docs

section-3-structured-data-projects/README.md

@@ -5,5 +5,7 @@ Structured data is data you'd usually find in an Excel spreadsheet, pandas DataF
 The notebooks in this folder deal with two end-to-end machine learning modelling projects using the tools from the previous section.
 
 Key:
-* Notebooks with "-video" on the end are taken directly from the lectures on Udemy.
-* Notebooks without "-video" on the end include annotations and extra information not seen in the lectures.
+
+* Notebooks with `v1` or `v2` on the end indicate version numbers, the higher the number, the newer the version.
+* Notebooks with `-video` on the end are taken directly from the lectures on Udemy/Zero to Mastery.
+* Notebooks without `-video` on the end include annotations and extra information not seen in the video lectures.