Merge pull request #477 from BitcoinDesign/feature/why-bitcoin-is-unique-lightning-revision

Added ⚡️ content to `Getting Started` > `Why bitcoin is unique`

Author: pavlenex

_compress_images_cache.yml

@@ -1401,3 +1401,5 @@ assets/images/guide/designing-products/principles/principles-mobile.png: princip
 assets/images/guide/designing-products/principles/principles-mobile@2x.png: principles-mobile@2x.png
 assets/images/guide/designing-products/principles/principles@2x.png: principles@2x.png
 assets/images/guide/designing-products/principles/principles-preview.png: principles-preview.png
+assets/images/guide/getting-started/why-bitcoin-is-unique/supply.jpg: supply.jpg
+assets/images/guide/getting-started/why-bitcoin-is-unique/supply@2x.jpg: supply@2x.jpg