add missing redirect frontmatter (github#17042)

Co-authored-by: Sarah Schneider <[email protected]>

Author: rachmari

content/graphql/reference/enums.md

@@ -2,6 +2,7 @@
 title: Enums
 redirect_from:
   - /v4/enum
+  - /v4/reference/enum
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/input-objects.md

@@ -2,6 +2,7 @@
 title: Input objects
 redirect_from:
   - /v4/input_object
+  - /v4/reference/input_object
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/interfaces.md

@@ -2,6 +2,7 @@
 title: Interfaces
 redirect_from:
   - /v4/interface
+  - /v4/reference/interface
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/mutations.md

@@ -2,6 +2,7 @@
 title: Mutations
 redirect_from:
   - /v4/mutation
+  - /v4/reference/mutation
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/objects.md

@@ -2,6 +2,7 @@
 title: Objects
 redirect_from:
   - /v4/object
+  - /v4/reference/object
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/queries.md

@@ -3,6 +3,7 @@ title: Queries
 miniTocMaxHeadingLevel: 2
 redirect_from:
   - /v4/query
+  - /v4/reference/query
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/scalars.md

@@ -2,6 +2,7 @@
 title: Scalars
 redirect_from:
   - /v4/scalar
+  - /v4/reference/scalar
 versions:
   free-pro-team: '*'
   enterprise-server: '*'

content/graphql/reference/unions.md

@@ -2,6 +2,7 @@
 title: Unions
 redirect_from:
   - /v4/union
+  - /v4/reference/union
 versions:
   free-pro-team: '*'
   enterprise-server: '*'