Bump gatsby-plugin-canonical-urls from 3.2.0 to 3.4.0

Bumps [gatsby-plugin-canonical-urls](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-canonical-urls) from 3.2.0 to 3.4.0.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-canonical-urls/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-canonical-urls@3.4.0/packages/gatsby-plugin-canonical-urls)

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

package.json

@@ -70,7 +70,7 @@
     "classnames": "^2.3.1",
     "copy-to-clipboard": "^3.3.1",
     "find-package-json": "^1.2.0",
-    "gatsby-plugin-canonical-urls": "^3.2.0",
+    "gatsby-plugin-canonical-urls": "^3.4.0",
     "gatsby-plugin-image": "^1.1.2",
     "gatsby-plugin-postcss": "^4.1.0",
     "gatsby-plugin-react-helmet": "^4.4.0",