test: fix expected event name

Author: dariakp

test/integration/retryable-reads/retryable_reads.spec.prose.test.ts

@@ -103,7 +103,7 @@ describe('Retryable Reads Spec Prose', () => {
         );
         expect(cmapEvents.shift()).to.have.property(
           'name',
-          'connectionCheckOutStarted',
+          'connectionCheckedOut',
           'expected 3) first checkout to succeed'
         );
 

test/integration/retryable-writes/retryable_writes.spec.prose.test.ts

@@ -156,7 +156,7 @@ describe('Retryable Writes Spec Prose', () => {
         );
         expect(cmapEvents.shift()).to.have.property(
           'name',
-          'connectionCheckOutStarted',
+          'connectionCheckedOut',
           'expected 3) first checkout to succeed'
         );