Fix a previously overstrict log message check.

OpenSSL doesn't seem to report error locations in the same way as
before, which broke one of our tests.

Fixes bug 40170; bugfix on 0.2.8.1-alpha.

changes/ticket40170

+  o Minor bugfixes (tests):
+    - Fix the "tortls/openssl/log_one_error" test to work with OpenSSL 3.0.0.
+      Fixes bug 40170; bugfix on 0.2.8.1-alpha.

src/test/test_tortls_openssl.c

@@ -283,8 +283,7 @@ test_tortls_log_one_error(void *ignored)
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, 3), LOG_WARN, 0, NULL);
-  expect_log_msg("TLS error with 127.hello: "
-            "BN lib (in unknown library:(null):---)\n");
+  expect_log_msg_containing("TLS error with 127.hello");
 
   mock_clean_saved_logs();
   tor_tls_log_one_error(tls, ERR_PACK(1, 2, SSL_R_HTTP_REQUEST),