fix(controller): make git-pr-waiter get pr number using correct key (#…

…2601)

Signed-off-by: Kent Rancourt <[email protected]>

internal/directives/git_pr_waiter.go

@@ -147,7 +147,7 @@ func getPRNumber(sharedState State, cfg GitWaitForPRConfig) (int64, error) {
 				cfg.PRNumberFromOpen,
 			)
 		}
-		prNumberAny, exists := stepOutputMap[branchKey]
+		prNumberAny, exists := stepOutputMap[prNumberKey]
 		if !exists {
 			return 0, fmt.Errorf(
 				"no PR number found in output from step with alias %q",