fix raw_ssl_request method for ruby 3.2.1

With ruby 3.2.1 upgrade depracated method for calling =~ on Object was removed
https://bugs.ruby-lang.org/issues/15231

This causes
`logger.warn "#{self.class} posting to plaintext endpoint, which is insecure" if logger unless endpoint =~ /^https:/` to throw an error.

Casting endpoint to string resolves this problem as all objects for handling uri
should respond to `to_s` method

lib/active_utils/posts_data.rb

@@ -43,7 +43,7 @@ def ssl_request(method, endpoint, data, headers)
 
     def raw_ssl_request(method, endpoint, data, headers = {})
       logger.warn "#{self.class} using ssl_strict=false, which is insecure" if logger unless ssl_strict
-      logger.warn "#{self.class} posting to plaintext endpoint, which is insecure" if logger unless endpoint =~ /^https:/
+      logger.warn "#{self.class} posting to plaintext endpoint, which is insecure" if logger unless endpoint.to_s =~ /^https:/
 
       connection = new_connection(endpoint)
       connection.open_timeout = open_timeout

test/unit/posts_data_test.rb

@@ -46,6 +46,15 @@ def test_logger_warns_if_ssl_strict_disabled
     @poster.raw_ssl_request(:post, "https://shopify.com", "", {})
   end
 
+  def test_logger_warns_can_handle_non_string_endpoints
+    @poster.logger = stub()
+    @poster.logger.expects(:warn).with("PostsDataTest::SSLPoster posting to plaintext endpoint, which is insecure")
+
+    Connection.any_instance.stubs(:request)
+
+    @poster.raw_ssl_request(:post, URI("http://shopify.com"), "", {})
+  end
+
   def test_logger_no_warning_if_ssl_strict_enabled
     @poster.logger = stub()
     @poster.logger.stubs(:warn).never