fixed a small conductor messaging bug (#90229)

* fixed a small messaging bug

* forgot to remove a s

dev/conductor/lib/next.dart

@@ -137,7 +137,11 @@ void runNext({
       if (unappliedCherrypicks.isEmpty) {
         stdio.printStatus('All engine cherrypicks have been auto-applied by the conductor.\n');
       } else {
-        stdio.printStatus('There were ${unappliedCherrypicks.length} cherrypicks that were not auto-applied.');
+        if (unappliedCherrypicks.length == 1) {
+          stdio.printStatus('There was ${unappliedCherrypicks.length} cherrypick that was not auto-applied.');
+        } else {
+          stdio.printStatus('There were ${unappliedCherrypicks.length} cherrypicks that were not auto-applied.');
+        }
         stdio.printStatus('These must be applied manually in the directory '
             '${state.engine.checkoutPath} before proceeding.\n');
       }
@@ -264,9 +268,12 @@ void runNext({
       } else if (unappliedCherrypicks.isEmpty) {
         stdio.printStatus('All framework cherrypicks were auto-applied by the conductor.');
       } else {
-        stdio.printStatus(
-          'There were ${unappliedCherrypicks.length} cherrypicks that were not auto-applied.',
-        );
+        if (unappliedCherrypicks.length == 1) {
+          stdio.printStatus('There was ${unappliedCherrypicks.length} cherrypick that was not auto-applied.',);
+        }
+        else {
+          stdio.printStatus('There were ${unappliedCherrypicks.length} cherrypicks that were not auto-applied.',);
+        }
         stdio.printStatus(
           'These must be applied manually in the directory '
           '${state.framework.checkoutPath} before proceeding.\n',

dev/conductor/test/next_test.dart

@@ -751,7 +751,7 @@ void main() {
         );
         expect(
           stdio.stdout,
-          contains('There were 1 cherrypicks that were not auto-applied'),
+          contains('There was 1 cherrypick that was not auto-applied'),
         );
         expect(
           stdio.stdout,