test: Set timeout of libsodium ed25519_convert test to 60s

Test takes 28s-29s to run in some configs, can fail in CI.

components/libsodium/test/test_sodium.c

@@ -39,7 +39,7 @@ TEST_CASE("box tests", "[libsodium]")
 
 extern int ed25519_convert_xmain();
 
-TEST_CASE("ed25519_convert tests", "[libsodium]")
+TEST_CASE("ed25519_convert tests", "[libsodium][timeout=60]")
 {
     printf("Running ed25519_convert\n");
     TEST_ASSERT_EQUAL(0, ed25519_convert_xmain() );