Fix a test, ConnectionErrorTest::InvalidPort. currently, the abcde.com is valid, so I change it. The first byte doesn't permit a hyphen.

test/test.cc

@@ -335,7 +335,7 @@ TEST(RangeTest, FromHTTPBin) {
 }
 
 TEST(ConnectionErrorTest, InvalidHost) {
-  auto host = "abcde.com";
+  auto host = "-abcde.com";
   auto sec = 2;
 
 #ifdef CPPHTTPLIB_OPENSSL_SUPPORT