Patch/add titles in links

[vincentsarago]

curl http://127.0.0.1:8081  | jq '.links[]'
{
  "rel": "self",
  "type": "application/json",
  "title": "This document",
  "href": "http://127.0.0.1:8081/"
}
{
  "rel": "root",
  "type": "application/json",
  "title": "Root",
  "href": "http://127.0.0.1:8081/"
}
{
  "rel": "data",
  "type": "application/json",
  "title": "Collections available for this Catalog",
  "href": "http://127.0.0.1:8081/collections"
}
{
  "rel": "conformance",
  "type": "application/json",
  "title": "STAC/OGC conformance classes implemented by this server",
  "href": "http://127.0.0.1:8081/conformance"
}
{
  "rel": "search",
  "type": "application/geo+json",
  "title": "STAC search [GET]",
  "href": "http://127.0.0.1:8081/search",
  "method": "GET"
}
{
  "rel": "search",
  "type": "application/geo+json",
  "title": "STAC search [POST]",
  "href": "http://127.0.0.1:8081/search",
  "method": "POST"
}
{
  "rel": "http://www.opengis.net/def/rel/ogc/1.0/queryables",
  "type": "application/schema+json",
  "title": "Queryables available for this Catalog",
  "href": "http://127.0.0.1:8081/queryables"
}
{
  "rel": "service-desc",
  "type": "application/vnd.oai.openapi+json;version=3.0",
  "title": "OpenAPI service description",
  "href": "http://127.0.0.1:8081/api"
}
{
  "rel": "service-doc",
  "type": "text/html",
  "title": "OpenAPI service documentation",
  "href": "http://127.0.0.1:8081/api.html"
}