fix: Correct MCP API examples and secret naming

- Fix update_mask to be query parameter in scale-resources.adoc
- Fix SASL configuration to use array format in pipeline-patterns.adoc
- Update secret references to use uppercase snakecase (OPENAI_API_KEY)
- All changes follow OpenAPI spec and documented conventions

Author: JakeSCahill

modules/ai-agents/pages/mcp/overview.adoc

@@ -14,7 +14,7 @@ In Redpanda Cloud, there are two complementary options to use MCP:
 
 [cols="1s,2a,2a"]
 |===
-| Redpanda Cloud MCP Server badge::[label=beta, tooltip={page-beta-text}] | Remote MCP
+| |Redpanda Cloud MCP Server badge::[label=beta, tooltip={page-beta-text}] | Remote MCP
 
 | Description
 | A server that gives your AI assistant access to your Redpanda Cloud account and clusters.

modules/ai-agents/pages/mcp/remote/pipeline-patterns.adoc

@@ -130,7 +130,7 @@ Integrate AI and LLM services into your MCP tools for intelligent data processin
 [source,yaml]
 ----
 openai_chat_completion:
-  api_key: "${secrets.openai.api_key}"
+  api_key: "${secrets.OPENAI_API_KEY}"
   model: "gpt-4"
   prompt: |
     Analyze this customer feedback and provide:
@@ -149,7 +149,7 @@ See also: xref:develop:connect/components/processors/openai_chat_completion.adoc
 [source,yaml]
 ----
 openai_embeddings:
-  api_key: "${secrets.openai.api_key}"
+  api_key: "${secrets.OPENAI_API_KEY}"
   model: "text-embedding-3-small"
   text: ${! json("content") }
 ----

modules/ai-agents/pages/mcp/remote/scale-resources.adoc

@@ -39,7 +39,7 @@ Data Plane API::
 +
 [,bash]
 ----
-curl -X PATCH "https://<dataplane-api-url>/v1/redpanda-connect/mcp-servers/<mcp-server-id>" \
+curl -X PATCH "https://<dataplane-api-url>/v1/redpanda-connect/mcp-servers/<mcp-server-id>?update_mask=resources" \
   -H "Authorization: Bearer <token>" \
   -H "Content-Type: application/json" \
   -d '{
@@ -48,8 +48,7 @@ curl -X PATCH "https://<dataplane-api-url>/v1/redpanda-connect/mcp-servers/<mcp-
         "memory_shares": "2Gi",
         "cpu_shares": "1000m"
       }
-    },
-    "update_mask": "resources"
+    }
   }'
 ----
 +