config: Change 'generate_feed' to 'generate_feeds'

Zola v0.19.0 adds support for generating multiple feeds [1]. However,
this also introduces a breaking change. This means that the
'generate_feed' option in the 'config.toml' is no longer called
'generate_feed' but 'generate_feeds'.

Therefore, replace 'generate_feed' with 'generate_feeds' in the
'config.toml' to avoid build errors.

Link: getzola/zola#2477 [1]
Signed-off-by: Stefan Kühnel <[email protected]>

config.toml

@@ -8,7 +8,7 @@ compile_sass = true
 minify_html = true
 
 # When set to "true", a feed is automatically generated.
-generate_feed = true
+generate_feeds = true
 
 # Whether to build a search index to be used later on by a JavaScript library
 build_search_index = false