avr-gcc@10: bump

Closes #333.

Signed-off-by: Ladislas de Toldi <[email protected]>

Author: fauxpark

Formula/[email protected]

@@ -8,7 +8,7 @@ class AvrGccAT10 < Formula
 
   license "GPL-3.0-or-later" => { with: "GCC-exception-3.1" }
 
-  revision 2
+  revision 3
 
   head "https://gcc.gnu.org/git/gcc.git", branch: "releases/gcc-10"