Fix casing of DEFAULT_ALGORITHM

// This is the single place where the default algorithm is set. It must be all uppercased.

// There is some special logic in HttpChecksumTest and in the http_request_checksum inlineable

// for testing the default case, if you change this value you will have to update that logic as well.

const val defaultAlgorithm = "CRC32"

const val DEFAULT_ALGORITHM = "CRC32"

/**

 * Extract the name of the operation's input member that indicates which checksum algorithm to use

    return {

        if (requestAlgorithmMember == null && isRequestChecksumRequired) {

            // Checksums are required but a user can't set one, so we set the default for them

            rust("""let checksum_algorithm = Some("${defaultAlgorithm.lowercase()}");""")

            rust("""let checksum_algorithm = Some("${DEFAULT_ALGORITHM.lowercase()}");""")

        } else {

            // Use checksum algo set by user

            rust("""let checksum_algorithm = checksum_algorithm.map(|algorithm| algorithm.as_str());""")

                                        (_, _, _, _, true) => {}

                                        (#{RequestChecksumCalculation}::WhenSupported, _, false, false, _)

                                        | (#{RequestChecksumCalculation}::WhenRequired, true, false, false, _) => {

                                            request.headers_mut().insert(${requestAlgoHeader.dq()}, "$defaultAlgorithm");

                                            request.headers_mut().insert(${requestAlgoHeader.dq()}, "$DEFAULT_ALGORITHM");

                                        }

                                        _ => {},

                                    }