[basics] adds LANG to terminal setup

fixes #42

basics.html

@@ -32,6 +32,7 @@
             notes:
             - `make -B` to create images
             - two terminals each with same tmux session, increase font size
+            - `export LANG=en_US.UTF-8`
             - `export PS1="\\[\\033[0;36m\\]\\w\\[\\033[0;35m\\]\$(__git_ps1 \" (%s)\")\\[\\033[0;36m\\] $ \\[\\033[0m\\]"`
             - remove git config for demo
             - log in to git.idiv.de