chore: editoral changes

Updated content to reflect changes since 2021:
- go-ipfs got renamed to Kubo, ipfs.io websites moved to ipfs.tech
- Cloudflare and Fleek provide turn-key website hosting  solutions
- Gateway docs and resources got updated and changed links
- DNSLink is not limited to DWeb, adjusted language and added best
  practices around supporting multiple protocol records

Added some references:
- mentioned convention from RFC 1464 (<key>=<value>)
- due to this,  clarified that prefix is `dnslink=` and not `dnslink=/`
  and why value should start with `/namespace/` prefix

Fixed small typos and removed line numbers from code blocks.

.vuepress.config.ts

@@ -20,6 +20,9 @@ export default defineUserConfig({
     })
   ],
   markdown: {
+    code: {
+        lineNumbers: false
+    },
     linkify: true
   },
   theme: defaultTheme({