update function name to generateUuid()

Signed-off-by: Xun Zhang <xunzh@amazon.com>

Author: Zhangxunmt

_data-prepper/pipelines/functions.md

@@ -12,7 +12,7 @@ OpenSearch Data Prepper offers a range of built-in functions that can be used wi
 
 - [`cidrContains()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/cidrcontains/)
 - [`contains()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/contains/)
-- [`generate_uuid()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/generate-uuid/)
+- [`generateUuid()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/generate-uuid/)
 - [`getMetadata()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/get-metadata/)
 - [`getEventType()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/get-eventtype/)
 - [`hasTags()`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/has-tags/)

_data-prepper/pipelines/generate-uuid.md

@@ -1,27 +1,27 @@
 ---
 layout: default
-title: generate_uuid()
+title: generateUuid()
 parent: Functions
 grand_parent: Pipelines
 nav_order: 11
 ---
 
-# generate_uuid()
+# generateUuid()
 
-The `generate_uuid()` function takes no arguments and returns a randomly generated [UUID version 4](https://www.rfc-editor.org/rfc/rfc4122) string, for example, `"550e8400-e29b-41d4-a716-446655440000"`. Each call produces a unique value using a cryptographically strong random number generator, so collision probability is negligible in practice.
+The `generateUuid()` function takes no arguments and returns a randomly generated [UUID version 4](https://www.rfc-editor.org/rfc/rfc4122) string, for example, `"550e8400-e29b-41d4-a716-446655440000"`. Each call produces a unique value using a cryptographically strong random number generator, so collision probability is negligible in practice.
 
 This function is useful when source records do not contain a natural unique identifier---for example, when running asynchronous batch inference jobs that require a stable key to match inference results back to the original records.
 
 ## Usage
 
-Use `generate_uuid()` as a `value_expression` in the [`add_entries`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/add-entries/) processor:
+Use `generateUuid()` as a `value_expression` in the [`add_entries`]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/add-entries/) processor:
 
 ```yaml
 processor:
   - add_entries:
       entries:
         - key: recordId
-          value_expression: 'generate_uuid()'
+          value_expression: 'generateUuid()'
 ```
 {% include copy.html %}
 
@@ -41,7 +41,7 @@ uuid-demo-pipeline:
     - add_entries:
         entries:
           - key: recordId
-            value_expression: 'generate_uuid()'
+            value_expression: 'generateUuid()'
 
   sink:
     - opensearch: