Set content-type when fetching artifact data

Author: JoshMock

test_elasticsearch_serverless/test_server/test_rest_api_spec.py

@@ -593,7 +593,13 @@ def remove_implicit_resolver(cls, tag_to_remove):
         )
 
     # Download the zip and start reading YAML from the files in memory
-    package_zip = zipfile.ZipFile(io.BytesIO(http.request("GET", package_url).data))
+    package_zip = zipfile.ZipFile(
+        io.BytesIO(
+            http.request(
+                "GET", package_url, headers={"content-type": "application/json"}
+            ).data
+        )
+    )
     for yaml_file in package_zip.namelist():
         if not re.match(r"^rest-api-spec/test/.*\.ya?ml$", yaml_file):
             continue