performance tuning and hugo version upgrade

config.toml

@@ -216,6 +216,8 @@ url = "https://v1-18.docs.kubernetes.io"
 [params.ui]
 # Enable to show the side bar menu in its compact state.
 sidebar_menu_compact = false
+# https://github.com/gohugoio/hugo/issues/8918#issuecomment-903314696
+sidebar_cache_limit = 1
 #  Set to true to disable breadcrumb navigation.
 breadcrumb_disable = false
 #  Set to true to hide the sidebar search box (the top nav search box will still be displayed if search is enabled)

netlify.toml

@@ -8,7 +8,7 @@ command = "git submodule update --init --recursive --depth 1 && make non-product
 
 [build.environment]
 NODE_VERSION = "10.20.0"
-HUGO_VERSION = "0.82.0"
+HUGO_VERSION = "0.87.0"
 RUBY_VERSION = "3.0.1"
 
 [context.production.environment]