fix(service-infrastructure.md): fix typo

docs/explanations/service-infrastructure.md

@@ -523,7 +523,7 @@ require you knowing the `gcp-product-factory` or `gitlab-runner-infrastructure`
       <code>principalSet://iam.googleapis.com/projects/421963284348/locations/global/workloadIdentityPools/gitlab/attribute.gitlab_namespace_id/<em>&laquo;numeric-gitlab-namespace-id&raquo;</em></code>
     * CI jobs running triggered by a specific GitLab user:
       <code>principalSet://iam.googleapis.com/projects/421963284348/locations/global/workloadIdentityPools/gitlab/attribute.gitlab_user_id/<em>&laquo;numeric-gitlab-user-id&raquo;</em></code>
-* GitLab CI/CD Runner princpals ([documentation](../explanations/gke-gitlab-runners.md)):
+* GitLab CI/CD Runner principals ([documentation](../explanations/gke-gitlab-runners.md)):
     * Any CI job running within a specific GitLab CI runner:
       <code>serviceAccount:gitlab-runner-prod-22257483.svc.id.goog[<em>&laquo;runner-product-name&raquo;</em>/gke-ci-run]</code>
 * Product-wide Google Project principals ([documentation](../reference/cloud-platform/permissions-and-roles.md)):