Modify acknowledgment and bio for Arianna Martinelli (#1689)

Arianna is no longer with us... (HCB team not dead). o7

Author: alexdevz

public/team.json

@@ -623,8 +623,8 @@
     "name": "Arianna Martinelli",
     "department": "HCB",
     "role": "Operations Mentor",
-    "acknowledged": false,
-    "bio": "Arianna (a current freshman at Carnegie-Mellon University and a former Hack Club leader from Kentucky) loves onboarding all our cool organizations and making HCB more accessible. When she’s not learning about how humans and computers can work together, she’s making memes and decorating the world with Hack Club stickers.",
+    "acknowledged": true,
+    "bio": "Arianna (a current freshman at Carnegie-Mellon University and a former Hack Club leader from Kentucky) loved onboarding all our cool organizations and making HCB more accessible. When she’s not learning about how humans and computers can work together, she’s making memes and decorating the world with Hack Club stickers.",
     "bioHackFoundation": "",
     "slackId": "U012U7V5W22",
     "email": "arianna",