github-pr-review: fix rnd position with column == 1 handling

It actually should use the end line as-is. For example, if a suggestion
want to remove line-break, the end line actually needs to be the line
after the line-break.

service/github/github.go

@@ -152,11 +152,6 @@ func buildDraftReviewComment(c *reviewdog.Comment, body string) *github.DraftRev
 func githubCommentLine(c *reviewdog.Comment) int {
 	loc := c.Result.Diagnostic.GetLocation()
 	line := loc.GetRange().GetEnd().GetLine()
-	// End position with column == 1 means range to the end of the previous lines
-	// including line-break.
-	if loc.GetRange().GetEnd().GetColumn() == 1 {
-		line--
-	}
 	if line == 0 {
 		line = loc.GetRange().GetStart().GetLine()
 	}

service/github/github_test.go

@@ -236,7 +236,7 @@ func TestGitHubPullRequest_Post_Flush_review_api(t *testing.T) {
 				{
 					Path:      github.String("reviewdog.go"),
 					StartLine: github.Int(15),
-					Line:      github.Int(16),
+					Line:      github.Int(17),
 					Body:      github.String(commentutil.BodyPrefix + "\nmultiline existing comment (line-break)"),
 				},
 			}