in_splunk: fix the invalid data format response when submitting valid data.#10939

cosmo0920 merged 2 commits into4.0fluent/fluent-bit:4.0from

pwhelan-fix-in-splunk-invalid-data-format-http1fluent/fluent-bit:pwhelan-fix-in-splunk-invalid-data-format-http1Copy head branch name to clipboard