fix 'self' in prepareExo (#10557) #38107

Job	Run time
pre_check / Check preconditions and cancel previous jobs	3s
deployment-test	32m 41s
getting-started (link-cli/yarn)	10m 27s
getting-started (registry/yarn)	14m 14s
getting-started (registry/npm)	14m 24s
test-docker-build	42m 17s
getting-started (registry/npx)	14m 9s
test-multichain-e2e / Multichain E2E (Fast USDC) / multichain-e2e	12m 35s
test-multichain-e2e / Multichain E2E (Orchestration API) / multichain-e2e	34m 55s
finalize-integration-result	5s
	2h 55m 50s

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