clippy: remove unnecessary From calls

src/types.rs

@@ -1224,8 +1224,8 @@ impl Milestone {
             title,
             description: None,
             state: MilestoneState::Active,
-            created_at: DateTime::from(Utc::now()),
-            updated_at: DateTime::from(Utc::now()),
+            created_at: Utc::now(),
+            updated_at: Utc::now(),
             due_date: None,
             start_date: None,
         }
@@ -1469,8 +1469,8 @@ impl Issue {
             title,
             description: None,
             state: IssueState::Opened,
-            created_at: DateTime::from(Utc::now()),
-            updated_at: DateTime::from(Utc::now()),
+            created_at: Utc::now(),
+            updated_at: Utc::now(),
             closed_at: None,
             closed_by: None,
             labels: Vec::new(),