Update Dockerfile

Co-authored-by: Anna Filina <afilina@gmail.com>

Author: lacatoire

.docker/Dockerfile

@@ -8,7 +8,7 @@ ENV LANG=C.UTF-8 \
     DOC_DIR=/var/www \
     PHD_DIR=/opt/phd
 
-# 🔧 Dependancies to PhD
+# 🔧 PhD dependencies
 RUN apk add --no-cache \
     git \
     icu-dev \