prisma.yml output directive needs .graphql extension

[sv-laurent]

Describe the bug
When installing:

• npm run new_service calls prisma deploy
• the new prisma module errors out during prisma deploy, saying that the output in prisma.yml needs a .graphql extension:

 ▸    Error: output for generator graphql-schema should be a .graphql-file. Please change the output property for this generator in
 ▸    prisma.yml

To Reproduce
Install according to your own instructions here, step 6

Expected behavior
The new_service script can't handle errors, so breaks non-gracefully, which means the default config doesn't get applied.
I would expect that this does not crash.

Additional context
This is fixed by simply replacing the output line in prisma.yml with output: ../src/generated/prisma.graphql