Update dependency @tryghost/helpers to v1.1.91 (#703)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -38,7 +38,7 @@
     "eslint-plugin-react": "7.35.0"
   },
   "dependencies": {
-    "@tryghost/helpers": "1.1.90",
+    "@tryghost/helpers": "1.1.91",
     "@tryghost/helpers-gatsby": "2.0.21",
     "cheerio": "1.0.0-rc.11",
     "gatsby": "4.25.7",

yarn.lock

@@ -2214,10 +2214,10 @@
     gatsby-link "4.17.0"
     prop-types "^15.6.2"
 
-"@tryghost/[email protected].90", "@tryghost/helpers@^1.1.90":
-  version "1.1.90"
-  resolved "https://registry.yarnpkg.com/@tryghost/helpers/-/helpers-1.1.90.tgz#a00765fdd235529eea98153db9d21ee29bdb312a"
-  integrity sha512-fHSAF9Sch9AfvZcqkHBV/LInL28HDMbzYqzvcGEP5f1qKzRVyPfyyHO2oGhZba2rHujnlF/MiwZTrNMvfA5Qmg==
+"@tryghost/[email protected].91", "@tryghost/helpers@^1.1.90":
+  version "1.1.91"
+  resolved "https://registry.yarnpkg.com/@tryghost/helpers/-/helpers-1.1.91.tgz#471c169a654e02d4ff80af894c3a5b5da6493112"
+  integrity sha512-swnmPviRHPlyKc0rY8AqQ6zlLE8CHomWgPk5oGgFJ10MrNsWmDICAygspB4enLyy1K8OuII9j4Ny5XxHIypM5Q==
   dependencies:
     lodash-es "^4.17.11"