paper: Add missing pyarrow dependency

Author: jonnor

.github/workflows/draft-pdf.yaml

@@ -21,7 +21,7 @@ jobs:
         path: micropython
         ref: master
     - name: Install Python dependencies
-      run: pip install plotly numpy pandas scikit-learn emlearn setuptools
+      run: pip install plotly numpy pandas scikit-learn emlearn setuptools pyarrow
     - name: Setup MicroPython Unix X86
       working-directory: micropython
       run: |

paper/README.md

@@ -34,7 +34,7 @@ The following Python files are used for support:
 ### Install Python dependencies
 
 ```
-pip install plotly numpy pandas scikit-learn emlearn setuptools
+pip install plotly numpy pandas scikit-learn emlearn setuptools pyarrow
 ```
 
 ### Install MicroPython modules