Fix build

[gnawf]

Please make sure you consider the following:

• Add tests that use __typename in queries
• Does this change work with all nadel transformations (rename, type rename, hydration, etc)? Add tests for this.
• Is it worth using hints for this change in order to be able to enable a percentage rollout?
• Do we need to add integration tests for this change in the graphql gateway?
• Do we need a pollinator check for this?

[github-actions]

Test Results

  624 files  +  624    624 suites  +624   1m 12s ⏱️ + 1m 12s
2 125 tests +2 125  1 598 ✅ +1 598  527 💤 +527  0 ❌ ±0 
2 133 runs  +2 133  1 606 ✅ +1 606  527 💤 +527  0 ❌ ±0 

Results for commit c30cd35. ± Comparison against base commit 58f5750.