changed H1s per SEO suggestions, added frontmatter where necessary#1067

ketkee-aryamane merged 13 commits intoelastic:mainelastic/elasticsearch-java:mainfrom

ketkee-aryamane:fix-H1s-per-seo-suggestionsketkee-aryamane/elasticsearch-java:fix-H1s-per-seo-suggestionsCopy head branch name to clipboard