update image size

Author: huijuechen

docs/about.html

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-<div style="width:600; font-size:80%; text-align:center;"><img src="https://ubc-mds.github.io/RStudio-GitHub-Analysis/assets/IMG_0442.jpg" alt="Team Photo" width=600 style="padding-bottom:0.5em;"
+<div style="width:650; font-size:60%; text-align:center;"><img src="https://ubc-mds.github.io/RStudio-GitHub-Analysis/assets/IMG_0442.jpg" alt="Team Photo" width=650 style="padding-bottom:0.5em;"
   /><i>(From left to right: Rayce Rossum, Ian Flores, Richie Zitomer, Dr. Tiffany Timbers, Juno Chen)</i></div>
 
 <p>We are a group of students from 2018-2019 UBC Master of Data Science (MDS) program. The program involves capstone projects during its last two months, when students work in teams with an external partner and a UBC mentor to address a question facing the partner using data science.</p>