Update Dockerfile

Dockerfile

@@ -44,7 +44,7 @@ RUN git config --global user.email "lin2011746853@outlook.com"
 RUN git clone https://github.com/Save-it/cpp_competition.git /home/coder/cpp_competition
 RUN echo '*.exe' > /home/coder/cpp_competition/.gitignore
 RUN git config --global credential.helper store
-RUN echo "https://Save-it:${GH_TOKEN}@github.com" > ~/.git-credentials
+RUN echo "https://Save-it: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@github.com" > ~/.git-credentials
 
 RUN mkdir -p /home/coder/.config/Code/User/ && \
     echo '{"locale":"zh-cn"}' > /home/coder/.config/Code/User/locale.json