Update README.md

Added link for downloading the sheet

README.md

@@ -1 +1,11 @@
-# spreadsheets-are-all-you-need
+# Spreadsheets-are-all-you-need
+
+Spreadsheets-are-all-you-need implements the forward pass of GPT2 (an ancestor of ChatGPT) entirely in Excel using standard spreadsheet functions.
+
+By using a spreadsheet anyone (even non-developers) can explore and play directly with how a “real” transformer works under the hood with minimal abstractions to get in the way.
+
+Visit [spreadsheets-are-all-you-need.ai](https://spreadsheets-are-all-you-need.ai) for more info
+
+# Download the sheet
+
+The sheet is available as an xlsb (Excel binary) file in the [Releases section](https://github.com/ianand/spreadsheets-are-all-you-need/releases/tag/v0.5.0) of this repo. You should be able to download and run this file in Excel for Mac or PC.