Update blocks.md

articles/hubs/blocks.md

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+# Blocks 
+Blocks are the micro-level building blocks of Hubs. They house multiple forms of content and allow for simple restructuring and modification. 
+
+<callout> Hovering over a Block reveals additional tooling including: Preview, Cut, Copy, Reference External Source, and Delete </>
+
+## Block Types 
+### Text Block 
+* A markup editor for adding any textual elements to your Hub 
+### JSON Schema
+* A block for describing the structure of a JSON object 
+### HTTP Request Maker 
+* A block for making HTTP requests 
+### Code
+* A block for inserting code snippets 
+### Image 
+* A block for inserting images
+### Tabs 
+* An upper level block for organizing text within tabs 
+### Callout 
+* A text block with color for emphasis 
+### Hero 
+* A large stylized text block with extra optional functionality typically found on landing pages 
+### Bar List 
+* A navigational block composed of bars with buttons 
+### Card List 
+* A navigational block composed of cards with text, buttons, and optional images
+### HTML 
+* Include arbitrary HTML in your hubs, when the other base block types don't quite do the trick