restore accidentally-deleted FIXME

Author: ianbotsf

.github/workflows/continuous-integration.yml

@@ -184,7 +184,8 @@ jobs:
         working-directory: ./smithy-kotlin
         shell: bash
         run: |
-          echo "kotlinWarningsAsErrors=true" >> $GITHUB_WORKSPACE/local.properties
+          # FIXME K2. Re-enable warnings as errors after this warning is removed: https://youtrack.jetbrains.com/issue/KT-68532
+          # echo "kotlinWarningsAsErrors=true" >> $GITHUB_WORKSPACE/local.properties
           ./gradlew apiCheck
           ./gradlew test jvmTest
       - name: Save Test Reports