controller: fix get mini git commit

Signed-off-by: Tianling Shen <[email protected]>

luasrc/controller/unblockneteasemusic.lua

@@ -57,7 +57,7 @@ end
 
 function update_core()
 	core_cloud_ver=luci.sys.exec("curl -s 'https://github.com/1715173329/UnblockNeteaseMusic/commits/enhanced' |tr -d '\n' |grep -Eo 'commit\/[0-9a-z]+' |sed -n 1p |sed 's#commit/##g'")
-	core_cloud_ver_mini=luci.sys.exec("curl -s 'https://github.com/1715173329/UnblockNeteaseMusic/commits/enhanced' |tr -d '\n' |grep -Eo 'BtnGroup-item.>      [0-9a-z]+' |sed -n 1p |sed 's#BtnGroup-item.>      ##g'")
+	core_cloud_ver_mini=string.sub(core_cloud_ver, 1, 7)
 	if not core_cloud_ver or not core_cloud_ver_mini then
 		return "1"
 	else