Fix missing backslash while configuring gitpod env.

Author: ggbecker

.gitpod.yml

@@ -15,7 +15,7 @@ tasks:
   - name: Prepare Env
     init: |
       pip install docker ansible json2html docutils==0.17.1 \
-        myst-parser
+        myst-parser \
         sphinx \
         sphinx-rtd-theme \
         git+https://github.com/ggbecker/sphinxcontrib.jinjadomain.git#egg=sphinxcontrib-jinjadomain