fix: fix TestGithubGHEPullRequestOkToTest

after changes in #2682, IssueCommentEvent paylaod
is required to have issue number in it to use across
event processing and as event payload is manually
sent to controller in TestGithubGHEPullRequestOkToTest,
issue number was not included and it failing due to the
reason.

Signed-off-by: Zaki Shaikh <zashaikh@redhat.com>

Author: zakisk

test/github_pullrequest_oktotest_test.go

@@ -75,6 +75,7 @@ func TestGithubGHEPullRequestOkToTest(t *testing.T) {
 				PullRequestLinks: &github.PullRequestLinks{
 					HTMLURL: github.Ptr(fmt.Sprintf("%s/pull/%d", runevent.URL, g.PRNumber)),
 				},
+				Number: github.Ptr(g.PRNumber),
 			},
 			Repo: &github.Repository{
 				DefaultBranch: &runevent.DefaultBranch,