Update cpp/src/arrow/flight/sql/odbc/tests/odbc_test_suite.cc

Co-authored-by: Alina (Xi) Li <96995091+alinaliBQ@users.noreply.github.com>

Author: amoeba

cpp/src/arrow/flight/sql/odbc/tests/odbc_test_suite.cc

@@ -181,7 +181,7 @@ void ODBCTestBase::TearDown() {
 
 void ODBCTestBase::TearDownTestSuite() {
   if (connected) {
-    // TODO(XXX): Without commenting this out, Disconnect() makes this test
+    // GH-49808 TODO: Without commenting this out, Disconnect() makes this test
     // executable segfault when run under ctest but not when the test executable
     // is run directly. This only happens under static test linkage.
     //