Renamed ctx.User to ctx.Doer. (#19161)

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/patch.go

@@ -90,7 +90,7 @@ func NewDiffPatchPost(ctx *context.Context) {
 		message += "\n\n" + form.CommitMessage
 	}
 
-	if _, err := files.ApplyDiffPatch(ctx, ctx.Repo.Repository, ctx.User, &files.ApplyDiffPatchOptions{
+	if _, err := files.ApplyDiffPatch(ctx, ctx.Repo.Repository, ctx.Doer, &files.ApplyDiffPatchOptions{
 		LastCommitID: form.LastCommit,
 		OldBranch:    ctx.Repo.BranchName,
 		NewBranch:    branchName,