fix: syntax error in gql query

When I ran the pipeline I got a GQL syntax error. Thought I try getting the fix upstream 😄

[14:56:20] ✖ Failed to fetch GQL: Expected one of SCHEMA, SCALAR, TYPE, ENUM, INPUT, UNION, INTERFACE, actual: RCURLY ("}") at [36, 1]: {"response":{"errors":[{"message":"Expected one of SCHEMA, SCALAR, TYPE, ENUM, INPUT, UNION, INTERFACE, actual: RCURLY (\"}\") at [36, 1]","locations":[{"line":36,"column":1}]}],"status":200,"headers":{}},"request":{"query":"query projectIssueEpic($projectFullPath: ID!, $iids: [String!]) {\n  project(fullPath: $projectFullPath) {\n    id\n    fullPath\n    visibility\n    name\n    group {\n      fullPath\n      id\n      visibility\n    }\n    issues(iids: $iids) {\n        nodes {\n          confidential\n          id\n          iid\n          hasEpic\n          hasParent\n          title\n          webUrl\n          epic {\n            id\n            iid\n            title\n            webUrl\n            group {\n              fullPath\n              visibility\n              id\n            }\n          }\n        }\n      }\n    }\n  }\n}","variables":{"projectFullPath":"gitlab-org/gitlab-development-kit","iids":["2594","1987","2563"]}}}