Merge branch 'fix-api-documentation' into 'master'

fix API documentation

See merge request !85

docs/maschinenraum.en.md

@@ -122,8 +122,8 @@ These can be created via the Maschinenraum (see image) or via API:
 Just send a REST POST Request to `/api/c/<conference_slug>/assembly/<assembly>/badges/new_redeem_token` with the following body:
 ```
 {
-  issuing_token: <secret_issuing_token>,
-  badge_class: <private|public|map|limited>,
+  issuing_token: "<secret_issuing_token>",
+  badge_class: "<single|permanent|limited|map>",
   amount: <int>
 }
 ```

docs/maschinenraum.md

@@ -125,8 +125,8 @@ Diese Redeem Tokens können im Maschinenraum (siehe Bild) oder per API erstellt
 REST POST Request to `/api/c/<conference_slug>/assembly/<assembly>/badges/new_redeem_token` mit dem folgenden body:
 ```
 {
-  issuing_token: <secret_issuing_token>,
-  badge_class: <private|public|map|limited>,
+  issuing_token: "<secret_issuing_token>",
+  badge_class: "<single|permanent|limited|map>",
   amount: <int>
 }
 ```