Update _config.yml (#90)

Author: joelostblom

source/_config.yml

@@ -11,7 +11,7 @@ only_build_toc_files: true
 #######################################################################################
 # Execution settings
 execute:
-  execute_notebooks: "force" # Whether to execute notebooks at build time. Must be one of ("auto", "force", "cache", "off")
+  execute_notebooks: "auto" # Whether to execute notebooks at build time. Must be one of ("auto", "force", "cache", "off")
   cache: "" # A path to the jupyter cache that will be used to store execution artifacts. Defaults to `_build/.jupyter_cache/`
   # exclude_patterns: [] # A list of patterns to *skip* in execution (e.g. a notebook that takes a really long time)
   timeout: 90 # The maximum time (in seconds) each notebook cell is allowed to run.