Fix MIME type URL case sensitivity in curl commands

Changed profile URL from Specification/DDI-CDI to specification/ddi-cdi (lowercase)

- Dataverse performs case-sensitive MIME type matching
- Lowercase specification/ddi-cdi is required for previewer to trigger
- Updated external tool registration examples in both 5.2 and 6.1 curl commands

Author: ErykKul

5.2curlcommands.md

@@ -873,7 +873,7 @@ curl -X POST -H 'Content-type: application/json' http://localhost:8080/api/admin
         {"locale":"{localeCode}"}
       ]
     },
-  "contentType":"application/ld+json; profile=\"http://www.w3.org/ns/json-ld#flattened http://www.w3.org/ns/json-ld#compacted https://ddialliance.org/Specification/DDI-CDI/1.0\""
+  "contentType":"application/ld+json; profile=\"http://www.w3.org/ns/json-ld#flattened http://www.w3.org/ns/json-ld#compacted https://ddialliance.org/specification/ddi-cdi/1.0\""
 }'
 ```
 

6.1curlcommands.md

@@ -1515,7 +1515,7 @@ curl -X POST -H 'Content-type: application/json' http://localhost:8080/api/admin
         {"locale":"{localeCode}"}
       ]
     },
-  "contentType":"application/ld+json; profile=\"http://www.w3.org/ns/json-ld#flattened http://www.w3.org/ns/json-ld#compacted https://ddialliance.org/Specification/DDI-CDI/1.0\"",
+  "contentType":"application/ld+json; profile=\"http://www.w3.org/ns/json-ld#flattened http://www.w3.org/ns/json-ld#compacted https://ddialliance.org/specification/ddi-cdi/1.0\"",
   "allowedApiCalls": [
     {
       "name": "retrieveFileContents",