Update Polly icon on page (#2917)

Update to Polly icon for rebrand

Author: katmayb

src/images/brand/polly-icon.png

@@ -15,9 +15,9 @@ import secret from '/snippets/langsmith/set-workspace-secrets.mdx';
 
 Polly helps you gain insight from your traces, conversation threads, and prompts without having to dig through data manually. By asking natural language questions, you can quickly understand agent performance, debug issues, and analyze user sentiment.
 
-<img src="/langsmith/images/polly.png" alt="LangSmith Polly icon" style={{float: 'left', marginRight: '20px', marginTop: '-1px', marginBottom: '20px', maxWidth: '100px'}} /> Polly appears in the right-hand bottom corner of the following locations within [LangSmith UI](https://smith.langchain.com):
+<img src="/images/brand/polly-icon.png" alt="LangSmith Polly icon" style={{float: 'left', marginRight: '20px', marginTop: '-1px', marginBottom: '20px', maxWidth: '100px'}} /> Polly appears in the right-hand bottom corner of the following locations within [LangSmith UI](https://smith.langchain.com):
 
-**Observability & Debugging:**
+<br></br><br></br>**Observability & Debugging:**
 - [Trace pages](#trace-pages): Analyze individual runs and execution traces.
 - [Thread views](#thread-views): Understand conversation threads and user interactions.
 
@@ -30,6 +30,18 @@ Polly helps you gain insight from your traces, conversation threads, and prompts
 - [Dataset Examples](#dataset-examples): Browse and understand dataset structure.
 - [Annotation Queues](#annotation-queues): Review runs and make informed annotation decisions.
 
+<img
+className="block dark:hidden"
+src="/langsmith/images/polly-datasets-light.png"
+alt="Polly chat in the sidebar on a dataset view."
+/>
+
+<img
+className="hidden dark:block"
+src="/langsmith/images/polly-datasets-dark.png"
+alt="Polly chat in the sidebar on a dataset view."
+/>
+
 ## Get started
 
 Before you start using Polly, you need to add an API key for the model you're using:
@@ -70,18 +82,6 @@ In the [Playground](/langsmith/prompt-engineering-concepts#prompt-playground), P
 - "Make the tone more professional"
 - "Simplify the instructions"
 
-<img
-className="block dark:hidden"
-src="/langsmith/images/polly-prompt-tool.png"
-alt="Prompt Playground showing Polly chat in the sidebar with information on a generated tool."
-/>
-
-<img
-className="hidden dark:block"
-src="/langsmith/images/polly-prompt-tool-dark.png"
-alt="Prompt Playground showing Polly chat in the sidebar with information on a generated tool."
-/>
-
 ### Prompt Hub pages
 
 When viewing a prompt in the [LangSmith Hub](/langsmith/prompt-engineering-concepts#langsmith-hub), Polly helps you understand the prompt's structure, messages, tools, and configuration. This is useful for exploring and learning from shared prompts.