Fix release.py script, was using an old api endpoint

package/release.py

@@ -126,10 +126,13 @@ def main():
 - [Debian Package]({debian_url}) ([sha256]({debian_sha_url}))
 - Docker image: registry.gitlab.com/{project_name}:{release_tag}'''
 
-    post_body: str = json.dumps({'description': augmented_changelog})
+    post_body: str = json.dumps({
+        'tag_name': release_tag,
+        'description': augmented_changelog
+    })
 
     gitlab_release_api_url: str = \
-        f'https://gitlab.com/api/v4/projects/{project_id}/repository/tags/{release_tag}/release'
+        f'https://gitlab.com/api/v4/projects/{project_id}/releases'
     headers: Dict[str, str] = {
         'Private-Token': api_token,
         'Content-Type': 'application/json; charset=utf-8',