https://git.ruby-lang.org/ruby.git/commit/?id=fe158e4c65

From fe158e4c6536432fec4b3f236910c5fcd9689c29 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Mon, 30 Dec 2019 23:23:25 -0800
Subject: Do not doubly build on trunk


diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index e754607..9a1d50a 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -2,7 +2,7 @@ name: Windows https://github.com/ruby/ruby/blob/trunk/.github/workflows/mingw.yml#L2
 on:
   push:
     branches:
-      - '*'
+      - master
   pull_request:
     branches:
       - '*'
-- 
cgit v0.10.2


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