Fix workflow typo (#50746)

Author: andrewbranch

.github/workflows/twoslash-repros.yaml

@@ -24,11 +24,11 @@ jobs:
     if: ${{ github.repository == 'microsoft/TypeScript' }}
     runs-on: ubuntu-latest
     steps:
-    - if: ${{ github.events.input.bisect }}
+    - if: ${{ github.event.inputs.bisect }}
       uses: actions/checkout@v3
       with:
         fetch-depth: 0
-    - if: ${{ !github.events.input.bisect }}
+    - if: ${{ !github.event.inputs.bisect }}
       uses: actions/checkout@v3
     - uses: actions/setup-node@v3
     - uses: microsoft/TypeScript-Twoslash-Repro-Action@master