add XPath Notebook ext. to recommended extensions in docs (#69)

Author: RandomFractals

README.md

@@ -139,7 +139,7 @@ Data Table 🈸 for Notebooks 📚 extension v1.6.0 and up ships with built-in N
 
 # Recommended Extensions
 
-Other recommended extensions for working with Interactive Notebooks 📚 data 🈸 charts 📈 and geo 🗺️ data formats in [VSCode](https://code.visualstudio.com/):
+Recommended extensions for working with Interactive Notebooks 📚 data 🈸 charts 📈 and geo 🗺️ data formats in [VSCode](https://code.visualstudio.com/):
 
 | Extension | Description |
 | --- | --- |
@@ -152,6 +152,7 @@ Other recommended extensions for working with Interactive Notebooks 📚 data 
 | [Data Preivew 🈸](https://marketplace.visualstudio.com/items?itemName=RandomFractalsInc.vscode-data-preview) | Data Preview 🈸 extension for importing 📤 viewing 🔎 slicing 🔪 dicing 🎲 charting 📊 & exporting 📥 large JSON array/config, YAML, Apache Arrow, Avro & Excel data files |
 | [Geo Data Viewer 🗺️](https://marketplace.visualstudio.com/items?itemName=RandomFractalsInc.geo-data-viewer) | [kepler.gl](https://kepler.gl) Geo Data Analytics tool to gen. some snazzy 🗺️s  w/0 `Py` 🐍 `pyWidgets` ⚙️ `pandas` 🐼 or `react` ⚛️ |
 | [Vega Viewer 📈](https://marketplace.visualstudio.com/items?itemName=RandomFractalsInc.vscode-vega-viewer) | Provides Interactive Preview of Vega & Vega-Lite maps 🗺️ & graphs 📈 |
+| [DeltaXML XPath Notebook 📓](https://marketplace.visualstudio.com/items?itemName=deltaxml.xpath-notebook) | XPath 3.1 Notebook for Visual Studio Code |
 
 # Dev Log