fix(sdk): cancel_request result

[0xernesto]

Remove semicolon to fix expected Result<(), Error>, found ()

[github-actions]

Test	Old	New	Diff
curve25519_dalek_ng_test_zero_mul	197063	197063	0.0000 %
p256_test_recover_pubkey_infinity	143003	143003	0.0000 %
bls12_381_tests_test_bls_double_100	9218745	9218745	0.0000 %
curve25519_dalek_test_zero_mul	197103	197103	0.0000 %
curve25519_dalek_test_decompressed_expected_value	16150463	15231050	-5.6928 %
k256_test_recover_high_hash_high_recid	2593051	2780029	7.2107 %
secp256k1_program_test_verify_v0_30_0_rand_lte_100	46832441	46902114	0.1488 %
bls12_381_tests_test_sqrt_fp_100	1006947	1020318	1.3279 %
bn_test_bn_test_g1_add_100	846324	846331	0.0008 %
bn_test_bn_test_fq_sqrt_100	763356	763356	0.0000 %
bls12_381_tests_test_inverse_fp_100	1375050	1375050	0.0000 %
k256_test_schnorr_verify	7040977	7035438	-0.0787 %
keccack_test_expected_digest_lte_100	2032560	2038090	0.2721 %
curve25519_dalek_test_zero_msm	213024	213024	0.0000 %
curve25519_dalek_test_add_then_multiply	7040735	7061723	0.2981 %
bls12_381_tests_test_sqrt_fp2_100	2134524	1730349	-18.9351 %
curve25519_dalek_ng_test_zero_msm	216592	216592	0.0000 %
bls12_381_tests_test_bls_add_100	15763438	15763438	0.0000 %
k256_test_verify_rand_lte_100	24811828	24834064	0.0896 %
curve25519_dalek_test_ed25519_verify	32352546	32350103	-0.0076 %
rust_crypto_rsa_test_pkcs_verify_100	101835438	101985180	0.1470 %
sha_test_sha2_v0_9_9_expected_digest_lte_100_times	1490103	1488165	-0.1301 %
sha_test_sha2_v0_10_6_expected_digest_lte_100_times	1739030	1732692	-0.3645 %
curve25519_dalek_ng_test_decompressed_noncanonical	206954	206954	0.0000 %
sha_test_sha2_v0_10_8_expected_digest_lte_100_times	1730164	1730499	0.0194 %
rustcrypto_bigint_test_bigint_mul_mod_special	2315020	2315020	0.0000 %
p256_test_recover_rand_lte_100	7267776	7254684	-0.1801 %
secp256k1_program_test_verify_rand_lte_100	46848933	46778569	-0.1502 %
bn_test_bn_test_fr_inverse_100	796856	796856	0.0000 %
secp256k1_program_test_recover_v0_30_0_rand_lte_100	6647048	6636586	-0.1574 %
bn_test_bn_test_g1_double_100	648027	648048	0.0032 %
curve25519_dalek_ng_test_add_then_multiply	7616851	6245689	-18.0017 %
rustcrypto_bigint_test_bigint_mul_add_residue	2253569	2253569	0.0000 %
k256_test_recover_rand_lte_100	5608787	5597277	-0.2052 %
secp256k1_program_test_recover_rand_lte_100	6601917	6601739	-0.0027 %
k256_test_recover_pubkey_infinity	124534	124534	0.0000 %
sha_test_sha3_expected_digest_lte_100_times	1668862	1668797	-0.0039 %
p256_test_verify_rand_lte_100	24848549	24844041	-0.0181 %
bls12_381_tests_test_inverse_fp2_100	3083020	3083020	0.0000 %
curve25519_dalek_test_decompressed_noncanonical	9169	9169	0.0000 %
p256_test_recover_high_hash_high_recid	3057506	3622994	18.4951 %
bn_test_bn_test_fq_inverse_100	766356	766356	0.0000 %