Final fix for curl callback function signature - use proper void* types

VERSION

@@ -1 +1 @@
-0.1.32
+0.1.33

nostr_core/core.c

@@ -249,7 +249,8 @@ typedef struct {
 /**
  * Callback function for curl to write HTTP response data
  */
-static size_t nip05_write_callback(char* contents, size_t size, size_t nmemb, nip05_http_response_t* response) {
+static size_t nip05_write_callback(void* contents, size_t size, size_t nmemb, void* userp) {
+    nip05_http_response_t* response = (nip05_http_response_t*)userp;
     size_t total_size = size * nmemb;
     
     // Check if we need to expand the buffer