Attempt to fix branch variable

Author: iluuu1994

.github/scripts/windows/find-target-branch.bat

@@ -1,4 +1,18 @@
 @echo off
 
-for /f "usebackq tokens=3" %%i in (`findstr PHP_MAJOR_VERSION main\php_version.h`) do set BRANCH=%%i
-for /f "usebackq tokens=3" %%i in (`findstr PHP_MINOR_VERSION main\php_version.h`) do set BRANCH=%BRANCH%.%%i
+if /i "%APPVEYOR%" equ "True" (
+	set BRANCH=%APPVEYOR_REPO_BRANCH:~4,3%
+) else (
+	if "%GITHUB_BASE_REF%" equ "master" (
+		set IS_MASTER = "True"
+	)
+	if "%GITHUB_HEAD_REF%" equ "master" (
+		set IS_MASTER = "True"
+	)
+	if "%IS_MASTER%" equ "True" (
+		set BRANCH = "master"
+	) else (
+		for /f "usebackq tokens=3" %%i in (`findstr PHP_MAJOR_VERSION main\php_version.h`) do set BRANCH=%%i
+		for /f "usebackq tokens=3" %%i in (`findstr PHP_MINOR_VERSION main\php_version.h`) do set BRANCH=%BRANCH%.%%i
+	)
+)