Update dependency @lekoarts/gatsby-theme-minimal-blog to v6

Author: renovate[bot]

package.json

@@ -15,7 +15,7 @@
     "lint": "prettier --write --config package.json \"./{content,pages,src}/**/*.{md,mdx,css,sass,less,json,js,jsx,ts,tsx}\""
   },
   "dependencies": {
-    "@lekoarts/gatsby-theme-minimal-blog": "2.4.0",
+    "@lekoarts/gatsby-theme-minimal-blog": "6.2.2",
     "gatsby": "2.20.36",
     "gatsby-plugin-ackee-tracker": "2.2.0",
     "gatsby-plugin-manifest": "2.4.13",