Fix $CONTEXT_ROOT usage

Closes gh-4

Author: rwinch

bust-cloudflare-antora-cache/bust-cloudflare-antora-cache.sh

@@ -15,4 +15,4 @@ curl -X GET "https://api.cloudflare.com/client/v4/user/tokens/verify" \
 
 curl -v -X POST "https://api.cloudflare.com/client/v4/zones/$CLOUDFLARE_ZONE_ID/purge_cache" \
       -H "Content-Type:application/json" -H "Authorization: Bearer $CLOUDFLARE_CACHE_TOKEN" \
-      --data '{"files":["https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/site.js","https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/vendor/docsearch.js","https://docs.spring.io/$CONTEXT_ROOT/reference/_/css/site.css","https://docs.spring.io/$CONTEXT_ROOT/reference/_/css/vendor/docsearch.css"]}'
+      --data "{\"files\":[\"https://docs.spring.io/$CONTEXT_ROOT/reference/_/css/vendor/asciidoctor-tabs.css\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/css/vendor/docsearch.css\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/css/vendor/spring-tabs.css\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/css/site.css\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/vendor/asciidoctor-tabs.js\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/vendor/highlight.js\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/vendor/spring-tabs.js\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/vendor/search.js\", \"https://docs.spring.io/$CONTEXT_ROOT/reference/_/js/site.js\"]}"