Bump postcss from 7.0.32 to 7.0.36

Bumps [postcss](https://github.com/postcss/postcss) from 7.0.32 to 7.0.36.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@7.0.32...7.0.36)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -33,7 +33,7 @@
     "gatsby-transformer-sharp": "2.5.21",
     "graphql": "14.7.0",
     "gray-matter": "4.0.2",
-    "postcss": "7.0.32",
+    "postcss": "7.0.36",
     "prism-react-renderer": "1.1.1",
     "prismjs": "1.21.0",
     "prop-types": "15.7.2",