trivial: Fix relevent typo

src/test/util_tests.cpp

@@ -572,7 +572,7 @@ BOOST_AUTO_TEST_CASE(util_GetChainName)
     BOOST_CHECK_THROW(test_args.GetChainName(), std::runtime_error);
 
     // check setting the network to test (and thus making
-    // [test] regtest=1 potentially relevent) doesn't break things
+    // [test] regtest=1 potentially relevant) doesn't break things
     test_args.SelectConfigNetwork("test");
 
     test_args.ParseParameters(0, (char**)argv_testnet);