fix: update dependency contentful to ^6.1.3 (#16838)

Author: renovate[bot]

packages/gatsby-source-contentful/package.json

@@ -13,7 +13,7 @@
     "base64-img": "^1.0.4",
     "bluebird": "^3.5.0",
     "chalk": "^2.4.2",
-    "contentful": "^6.1.0",
+    "contentful": "^6.1.3",
     "deep-map": "^1.5.0",
     "fs-extra": "^4.0.2",
     "gatsby-plugin-sharp": "^2.2.13",

yarn.lock

@@ -6701,9 +6701,10 @@ contentful-sdk-core@^6.0.1:
     lodash "^4.17.10"
     qs "^6.5.2"
 
-contentful@^6.1.0:
+contentful@^6.1.3:
   version "6.1.3"
   resolved "https://registry.yarnpkg.com/contentful/-/contentful-6.1.3.tgz#272f59e070807321ed6985882803bf804af65d6b"
+  integrity sha512-uf4MQey/aP/buRo4oCuyIfSD/r+ruxDyXN2z/n0XCi7s2x5NjKiKbbRIjRiYu5ylNiAvc+smLIXBooujtmqWEw==
   dependencies:
     "@contentful/axios" "^0.18.0"
     contentful-resolve-response "^1.1.4"