fix 2 bugs in circuit2.

frontend/circuit2.ts

@@ -712,7 +712,7 @@ const data: { trainings: ITraining[]; polls: any } = {
           blocks: [
             {
               id: 'block2',
-              duration: 13,
+              duration: 11,
               exercises: [
                 {
                   id: 'exercise0',
@@ -757,7 +757,7 @@ const data: { trainings: ITraining[]; polls: any } = {
               exercises: [
                 {
                   id: 'exercise1',
-                  name: 'Leg extension/split combo',
+                  name: 'Bicycle crunch',
                   repetitions: 1,
                   description:
                     'Sit down backwards, hip about knee-high. Keep your knees behind the toes.',
@@ -777,7 +777,7 @@ const data: { trainings: ITraining[]; polls: any } = {
               exercises: [
                 {
                   id: 'exercise1',
-                  name: 'Bicycle crunch',
+                  name: 'Leg extension/split combo',
                   repetitions: 1,
                   description:
                     'Sit down backwards, hip about knee-high. Keep your knees behind the toes.',