Issue body can be null now

src/github.rs

@@ -245,6 +245,7 @@ pub struct PullRequestDetails {
 #[derive(Debug, serde::Deserialize)]
 pub struct Issue {
     pub number: u64,
+    #[serde(default)]
     pub body: String,
     created_at: chrono::DateTime<Utc>,
     pub updated_at: chrono::DateTime<Utc>,