Updated to latest uf2 commit where file permissions are corrected.

EmergReanimator · EmergReanimator · commit 54065a771980 · 2022-01-07T10:04:11.000+01:00
diff --git a/tools/uf2 b/tools/uf2
@@ -1 +1 @@
-Subproject commit adbb8c7260f938e810eb37f2287f8e1a055ff402
+Subproject commit 1421ca7fe72a2b173b08be05f9042b79409e783a
