contrib: adding suggestion for URLs and updating vale info#1502

lecaros merged 2 commits intomasterfluent/fluent-bit-docs:masterfrom

lynettemiles/sc-115976/add-url-guidance-to-fluent-bit-contrib-guidefluent/fluent-bit-docs:lynettemiles/sc-115976/add-url-guidance-to-fluent-bit-contrib-guideCopy head branch name to clipboard