fix(deps): update starters and examples - gatsby (#27722)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

starters/gatsby-starter-blog-theme-core/package-lock.json

@@ -12,7 +12,7 @@
   "dependencies": {
     "@mdx-js/react": "^1.6.19",
     "gatsby": "^2.25.1",
-    "gatsby-theme-blog-core": "^1.5.61",
+    "gatsby-theme-blog-core": "^2.0.2",
     "react": "^16.12.0",
     "react-dom": "^16.12.0"
   }

starters/gatsby-starter-blog-theme-core/package.json

@@ -10,7 +10,7 @@
     "gatsby-image": "^2.4.21",
     "gatsby-plugin-manifest": "^2.5.1",
     "gatsby-plugin-mdx": "^1.3.0",
-    "gatsby-plugin-offline": "^2.2.10",
+    "gatsby-plugin-offline": "^3.3.1",
     "gatsby-plugin-react-helmet": "^3.3.14",
     "gatsby-plugin-sharp": "^2.7.0",
     "gatsby-source-filesystem": "^2.4.0",