Maintenance: Update dependency graphql to v2.3.18

Gemfile.lock

@@ -275,7 +275,7 @@ GEM
     gli (2.21.5)
     globalid (1.2.1)
       activesupport (>= 6.1)
-    graphql (2.3.16)
+    graphql (2.3.18)
       base64
       fiber-storage
     graphql-batch (0.6.0)