feat: Update allow.txt (#1752)

Add author names from citation for Mathvista dataset for Vertex AI
Prompt Optimizer Multimodal Notebook.

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Fixes #<issue_number_goes_here> 🦕

.github/actions/spelling/allow.txt

@@ -61,6 +61,7 @@ CWLEY
 CZE
 Caprese
 Chocolat
+Chunyuan
 Codicote
 Colm
 Connectez
@@ -162,6 +163,7 @@ HVDC
 HZN
 Hamamoto
 Hamers
+Hannaneh
 Harvick
 Hawkins'll
 Hbf
@@ -171,6 +173,7 @@ Hisaki
 Hmmm
 Hogwarts
 Homesley
+Hritik
 Hubmann
 Hyperdisk
 ICICI
@@ -192,6 +195,8 @@ JPY
 Jax
 Jedi
 Jhamtani
+Jiacheng
+Jianfeng
 Jibo
 Joji
 Jolyon