fix: add missing attribute `resolved_at` to `Note` class

src/main/java/org/gitlab4j/api/models/Note.java

@@ -97,6 +97,7 @@ public class Note {
     private Boolean resolved;
     private Boolean resolvable;
     private Participant resolvedBy;
+    private Date resolvedAt;
     private Type type;
 
     private Position position;
@@ -245,6 +246,14 @@ public class Note {
         this.resolvedBy = resolvedBy;
     }
 
+    public Date getResolvedAt() {
+        return resolvedAt;
+    }
+
+    public void setResolvedAt(Date resolvedAt) {
+        this.resolvedAt = resolvedAt;
+    }
+
     public Type getType() {
       return type;
     }

src/test/resources/org/gitlab4j/api/note.json

@@ -12,6 +12,10 @@
     "web_url": "https://gitlab.example.com/pipin"
   },
   "created_at": "2016-04-06T16:51:53.239Z",
+  "updated_at": "2021-09-14T09:03:50.221Z",
+  "resolvable": true,
+  "resolved": true,
+  "resolved_at": "2021-09-14T09:03:50.221Z",
   "system": false,
   "noteable_id": 52,
   "noteable_type": "Snippet",