Bump gatsby-plugin-robots-txt from 1.6.10 to 1.6.13 in /packages/website

Bumps [gatsby-plugin-robots-txt](https://github.com/mdreizin/gatsby-plugin-robots-txt) from 1.6.10 to 1.6.13.
- [Release notes](https://github.com/mdreizin/gatsby-plugin-robots-txt/releases)
- [Commits](https://github.com/mdreizin/gatsby-plugin-robots-txt/compare/v1.6.10...v1.6.13)

---
updated-dependencies:
- dependency-name: gatsby-plugin-robots-txt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

packages/website/package.json

@@ -25,7 +25,7 @@
     "gatsby-plugin-postcss": "^4.14.0",
     "gatsby-plugin-purgecss": "^6.0.2",
     "gatsby-plugin-react-helmet": "^4.14.0",
-    "gatsby-plugin-robots-txt": "^1.6.10",
+    "gatsby-plugin-robots-txt": "^1.6.13",
     "gatsby-plugin-sharp": "^3.14.1",
     "gatsby-plugin-svgr": "^3.0.0-beta.0",
     "gatsby-remark-classes": "^1.0.2",

packages/website/yarn.lock

@@ -6159,10 +6159,10 @@ gatsby-plugin-react-helmet@^4.14.0:
   dependencies:
     "@babel/runtime" "^7.15.4"
 
-gatsby-plugin-robots-txt@^1.6.10:
-  version "1.6.10"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-robots-txt/-/gatsby-plugin-robots-txt-1.6.10.tgz#b178efe3da65718a39d1acd2e5768f687b205cf0"
-  integrity sha512-soQT765LF0J8/dfrZGFuA/ZB/JUyvt2nVyHEFLUMd/qxgiem9x0EOZquJPId78xDHYePMkxNCPk9UsLcTZdFZw==
+gatsby-plugin-robots-txt@^1.6.13:
+  version "1.6.13"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-robots-txt/-/gatsby-plugin-robots-txt-1.6.13.tgz#01e1ce68e3f4e07f957ac9a20cd2a9e12fdd3f79"
+  integrity sha512-MUPJsvkALwSmfRb1L3IVNmzIqwV35fol1RVot425ZYXvtD+s0OtZli5VnhLNxsX0beodyavzFl0SRJCCQZz0/g==
   dependencies:
     "@babel/runtime" "^7.14.0"
     generate-robotstxt "^8.0.3"