Fix GH Actions branch name

Signed-off-by: Daniel Schaefer <[email protected]>

Author: JohnAZoidberg

Diff for: .github/workflows/firmware.yml

@@ -3,7 +3,7 @@ name: Firmware
 on:
   push:
     branches:
-      - master
+      - main
       - dev-*
     paths-ignore:
       - '*.py'

Diff for: .github/workflows/software.yml

@@ -3,7 +3,7 @@ name: Software
 on:
   push:
     branches:
-      - master
+      - main
       - dev-*
     paths-ignore:
       - 'b1display/**'

Diff for: .github/workflows/traditional-cargo.yml

@@ -5,7 +5,7 @@ name: Traditional Cargo
 on:
   push:
     branches:
-      - master
+      - main
       - dev-*
     paths-ignore:
       - '*.py'