netlify.toml: declare framework for dev

I've found that adding this live means I can use

    netlify dev --offline

without any further switches. For some reason, I had run into trouble with
"cecil" when using it like that.

Signed-off-by: Stephan Renatus <stephan.renatus@gmail.com>

netlify.toml

@@ -17,6 +17,7 @@ command = "make netlify-preview WASM_ENABLED=0 CGO_ENABLED=0"
 # "netlify dev" will serve the static content using netlify locally
 # with all the redirects and other netlify specific rules in place.
 publish = "docs/website/public"
+framework = "#static"
 
 # To run the netlify dev service with hugo dev server "live" behind
 # it uncomment these lines: