Update gatsby monorepo

Author: renovate-bot

package.json

@@ -17,15 +17,15 @@
     "assert": "2.0.0",
     "codemirror": "5.62.2",
     "codemirror-graphql": "1.0.2",
-    "gatsby": "3.10.1",
+    "gatsby": "3.12.0",
     "gatsby-plugin-anchor-links": "1.2.1",
-    "gatsby-plugin-feed": "3.10.0",
-    "gatsby-plugin-google-analytics": "3.10.0",
-    "gatsby-plugin-less": "5.10.0",
-    "gatsby-plugin-react-helmet": "4.10.0",
+    "gatsby-plugin-feed": "3.12.0",
+    "gatsby-plugin-google-analytics": "3.12.0",
+    "gatsby-plugin-less": "5.12.0",
+    "gatsby-plugin-react-helmet": "4.12.0",
     "gatsby-plugin-webfonts": "2.1.1",
-    "gatsby-source-filesystem": "3.10.0",
-    "gatsby-transformer-remark": "4.7.0",
+    "gatsby-source-filesystem": "3.12.0",
+    "gatsby-transformer-remark": "4.9.0",
     "globby": "11.0.4",
     "graphql": "15.5.1",
     "marked": "2.1.3",