Typo fix

shannona · web-flow · commit 306e7c89d4c7 · 2021-08-03T09:06:37.000-10:00
Typo fix courtesy of @csralvall
diff --git a/A2_0_Compiling_Bitcoin_from_Source.md b/A2_0_Compiling_Bitcoin_from_Source.md
@@ -28,7 +28,7 @@ $ su root
 
 ### Step 1: Update Your System
 
-Fir, update the system using:
+First, update the system using:
 ```
 $ sudo apt-get update
 ```
