Fix issue creation

Signed-off-by: Fred Boniface <fred@fjla.uk>

src/services/issue.services.js

@@ -26,8 +26,9 @@ async function sendToGitea(body) {
       method: "POST",
       headers: {
         Authorization: key,
+        "Content-Type": "application/json",
       },
-      body: body,
+      body: JSON.stringify(body),
     };
 
     const res = await fetch(url, opts);