[skip actions] updated readme and docs

Author: manujosephv

README.md

@@ -34,15 +34,15 @@ Although the installation includes PyTorch, the best and recommended way is to f
 Once, you have got Pytorch installed, just use:
 
 ```bash
-pip install pytorch_tabular[extra]
+pip install -U pytorch_tabular[extra]
 ```
 
 to install the complete library with extra dependencies (Weights&Biases & Plotly).
 
 And :
 
 ```bash
-pip install pytorch_tabular
+pip install -U pytorch_tabular
 ```
 
 for the bare essentials.
@@ -58,7 +58,7 @@ git clone git://github.com/manujosephv/pytorch_tabular
 Once you have a copy of the source, you can install it with:
 
 ```bash
-pip install .[extra]
+cd pytorch_tabular && pip install .[extra]
 ```
 
 ## Documentation

docs/contributing.md

@@ -59,10 +59,11 @@ git clone git@github.com:your_name_here/pytorch_tabular.git
 
 * Fork the pytorch_tabular repo on GitHub.
 
-* Clone your fork locally:
+* Clone your fork locally and change directory to the checked out folder:
 
       ```bash
       git clone git@github.com:your_name_here/pytorch_tabular.git
+      cd pytorch_tabular
       ```
 
 * Setup a local environment (preferably in a virtual environment). 
@@ -106,7 +107,11 @@ git clone git@github.com:your_name_here/pytorch_tabular.git
       ```bash
       pre-commit run --all-files
       ```
-   Accept the changes if any after reviewing.
+   Accept the changes if any after reviewing. 
+   
+!!!warning   
+
+      Do not commit pre-commit changes to to `setup.cfg`. The file has been excluded from one hook for bump2version compatibility. For a complet and uptodate list of excluded files, please check `.pre-commit-config.yaml` file.
 
 * Commit your changes and push your branch to GitHub:
       ```bash