chore(deps): bump gatsby-plugin-advanced-sitemap in /client

Bumps [gatsby-plugin-advanced-sitemap](https://github.com/tryghost/gatsby-plugin-advanced-sitemap) from 1.5.7 to 1.6.0.
- [Release notes](https://github.com/tryghost/gatsby-plugin-advanced-sitemap/releases)
- [Commits](https://github.com/tryghost/gatsby-plugin-advanced-sitemap/compare/v1.5.7...v1.6.0)

Signed-off-by: dependabot[bot] <support@github.com>

client/package-lock.json

@@ -11993,9 +11993,9 @@
       }
     },
     "gatsby-plugin-advanced-sitemap": {
-      "version": "1.5.7",
-      "resolved": "https://registry.npmjs.org/gatsby-plugin-advanced-sitemap/-/gatsby-plugin-advanced-sitemap-1.5.7.tgz",
-      "integrity": "sha512-OWNpJu5UaZtz4I1XoC+VYFGzO5M1xC7D61ijXmWt2VEsnQF2cbZ7CNGi/MHP4xzU/7Zcxe4qZT8M2A6xOWc5oA==",
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/gatsby-plugin-advanced-sitemap/-/gatsby-plugin-advanced-sitemap-1.6.0.tgz",
+      "integrity": "sha512-GU0v3Qt8LagfYZH/KQJuDtjLT+B1ZuwUcT225gQG9v9OUKVGGnPHXhMCLZvqdH1Ntwa4X8Zh+g2B/FE/vT7UJQ==",
       "requires": {
         "@babel/runtime": "7.12.5",
         "fs-extra": "9.1.0",

client/package.json

@@ -32,7 +32,7 @@
     "final-form": "^4.20.1",
     "gatsby": "^2.31.1",
     "gatsby-cli": "^2.19.1",
-    "gatsby-plugin-advanced-sitemap": "^1.5.7",
+    "gatsby-plugin-advanced-sitemap": "^1.6.0",
     "gatsby-plugin-create-client-paths": "^2.9.0",
     "gatsby-plugin-manifest": "^2.12.0",
     "gatsby-plugin-postcss": "^2.3.13",