pnpm run verify fails if deno isn't installed

[igalshilman]

@restatedev/deno:_check:types:
@restatedev/deno:_check:types: > @restatedev/deno@0.0.0 _check:types /Users/igalshilman/work/sdk-typescript/packages/examples/deno
@restatedev/deno:_check:types: > deno install && deno task check
@restatedev/deno:_check:types:
@restatedev/deno:_check:types: sh: line 1: deno: command not found
@restatedev/deno:_check:types:  ELIFECYCLE  Command failed.
@restatedev/node:lint:  ELIFECYCLE  Command failed with exit code 1.