added helena zhou profile

src/json/members/helenazh.json

@@ -0,0 +1,18 @@
+{
+    "name": "Helena Zhou",
+    "pennkey": "helenazh",
+    "major": "Computer Science",
+    "school": "Engineering",
+    "bio": "Hi! I like to cycle, play pickleball, and try new foods.",
+    "hometown": "Irvine, CA",
+    "team": "Penn Courses",
+    "roles": ["Frontend Engineer"],
+    "photo": "https://i.imgur.com/WC8KaYY.jpeg",
+    "linkedin": "https://linkedin.com/in/helena-zhou/",
+    "website": "",
+    "github": "https://github.com/zhouhelena",
+    "semester_joined": "2024A",
+    "alumnus": false,
+    "graduation_year": 2026,
+    "job": null
+  }