Update gatsby monorepo

Author: renovate[bot]

package.json

@@ -17,13 +17,13 @@
   },
   "dependencies": {
     "@lekoarts/gatsby-theme-cara": "1.2.20",
-    "gatsby": "2.32.13",
-    "gatsby-plugin-gatsby-cloud": "1.0.2",
-    "gatsby-plugin-google-analytics": "2.11.0",
+    "gatsby": "5.15.0",
+    "gatsby-plugin-gatsby-cloud": "5.14.0",
+    "gatsby-plugin-google-analytics": "5.15.0",
 
-    "gatsby-plugin-manifest": "2.12.1",
+    "gatsby-plugin-manifest": "5.15.0",
     "gatsby-plugin-netlify": "2.11.1",
-    "gatsby-plugin-offline": "3.10.2",
+    "gatsby-plugin-offline": "6.15.0",
     "gatsby-plugin-webpack-bundle-analyser-v2": "1.1.20",