W&B Inference: Added quick line about inference to landing page (#1567)

Description
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What is stated in title and removed an emoji.


Related issues
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- Fixes https://wandb.atlassian.net/browse/DOCS-1699

Author: ngrayluna

content/en/guides/_index.md

@@ -31,6 +31,8 @@ W&B consists of three major components: [Models]({{< relref "/guides/models.md"
 - [Tables]({{< relref "/guides/models/tables/" >}}): Visualize and query tabular data
 - [Reports]({{< relref "/guides/core/reports/" >}}): Document and collaborate on your discoveries
 
+**[W&B Inference]({{< relref "/guides/inference/" >}})** is a set of tools for accessing open-source foundation models through W&B Weave and an OpenAI-compatible API.
+
 {{% alert %}}
 Learn about recent releases in the [W&B release notes]({{< relref "/ref/release-notes/" >}}).
 {{% /alert %}}

content/en/guides/inference/_index.md

@@ -54,7 +54,7 @@ print(response.choices[0].message.content)
 W&B Inference credits come with Free, Pro, and Academic plans for a limited time. Availability may vary for Enterprise accounts. When credits run out:
 
 - **Free users** must upgrade to a paid plan to continue using Inference.  
-  👉 [Upgrade to Pro or Enterprise](https://wandb.ai/subscriptions)
+  [Upgrade to Pro or Enterprise](https://wandb.ai/subscriptions)
 - **Pro users** are billed monthly for usage beyond free credits, up to a default cap of $6,000/month. See [Account tiers and default usage caps]({{< relref "usage-limits#account-tiers-and-default-usage-caps" >}})
 - **Enterprise usage** is capped at $700,000/year. Your account executive handles billing and limit increases. See [Account tiers and default usage caps]({{< relref "usage-limits#account-tiers-and-default-usage-caps" >}})