fix typo

Author: jonathanmetzman

src/clusterfuzz/_internal/cron/project_setup.py

@@ -818,7 +818,7 @@ def _sync_job(self, project, info, corpus_bucket_name, quarantine_bucket_name,
           project_name=base_project_name,
           disk_size_gb=oss_fuzz_gb)
       if oss_fuzz_gb is not None:
-        job.envrionment_string += 'ALLOW_UNPACK_OVER_HTTP = True\n'
+        job.environment_string += 'ALLOW_UNPACK_OVER_HTTP = True\n'
 
       # Centipede requires a separate build of the sanitized binary.
       if template.engine == 'centipede':