DX-1601: Update Agents Researcher README (#81)

* feat: replace duckduckgo with exa

* fix: change repo link, add exa api key to readme

Author: yunusemreozdemir

examples/agents-researcher/README.md

@@ -1,4 +1,4 @@
-[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fupstash%2Fworkflow-js%2Ftree%2Fmain%2Fexamples%2Fagents-researcher&env=UPSTASH_REDIS_REST_URL,UPSTASH_REDIS_REST_TOKEN,QSTASH_TOKEN,OPENAI_API_KEY,WOLFRAM_ALPHA_APP_ID&project-name=upstash-workflow-agents-researcher&repository-name=upstash-workflow-agents-researcher&demo-title=Cross%20Reference%20Agent&demo-description=This%20is%20a%20simple%20example%20to%20demonstrate%20how%20to%20use%20Upstash%20Workflow%20Agents%20to%20cross-reference%20information%20from%20different%20sources.&demo-url=https%3A%2F%2Fagents-researcher.vercel.app%2F)
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fupstash%2Fworkflow-js%2Ftree%2Fmain%2Fexamples%2Fagents-researcher&env=UPSTASH_REDIS_REST_URL,UPSTASH_REDIS_REST_TOKEN,QSTASH_TOKEN,OPENAI_API_KEY,WOLFRAM_ALPHA_APP_ID,EXASEARCH_API_KEY&project-name=upstash-workflow-agents-researcher&repository-name=upstash-workflow-agents-researcher&demo-title=Cross%20Reference%20Agent&demo-description=This%20is%20a%20simple%20example%20to%20demonstrate%20how%20to%20use%20Upstash%20Workflow%20Agents%20to%20cross-reference%20information%20from%20different%20sources.&demo-url=https%3A%2F%2Fagents-researcher.vercel.app%2F)
 
 ## Deploying the Project at Vercel
 
@@ -28,6 +28,10 @@ You can get your API key from the [OpenAI Platform](https://platform.openai.com/
 
 You can get your App ID from the [Wolfram Alpha Developer Portal](https://developer.wolframalpha.com).
 
+5. `EXASEARCH_API_KEY`
+
+You can get your API key from the [Exa Dashboard](https://dashboard.exa.ai/api-keys).
+
 ### Deploying the Project
 
 Once you add the env variables, you can deploy the project with:

examples/agents-researcher/app/page.tsx

@@ -227,7 +227,7 @@ const Page = () => {
             </a>
             <a
               className="inline-flex items-center gap-1 px-3 py-2 bg-gray-100 rounded-md hover:bg-purple-100"
-              href="https://github.com/upstash/workflow-js/tree/main/examples/nextjs"
+              href="https://github.com/upstash/workflow-js/tree/main/examples/agents-researcher"
             >
               <svg
                 xmlns="http://www.w3.org/2000/svg"