adding meta descriptions

Author: jason-cf

src/content/docs/learning-paths/workflows-course/series/workflows-1.mdx

@@ -4,6 +4,8 @@ title: Introduction to Workflows
 sidebar:
   order: 1
 tableOfContents: false
+description: |
+  Cloudflare Workflows provides durable execution capabilities, allowing developers to create reliable, repeatable workflows that run in the background. Workflows are designed to resume execution even if the underlying compute fails, ensuring that tasks complete eventually. They are built on top of Cloudflare Workers and handle scaling and provisioning automatically.
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 import { Render, Tabs, TabItem, Stream, Card } from "~/components";

src/content/docs/learning-paths/workflows-course/series/workflows-2.mdx

@@ -4,6 +4,9 @@ title: Monitor and batch your website data
 sidebar:
   order: 2
 tableOfContents: false
+description: |
+    Workflows can be used to process batches of data, ensuring each item in the batch goes through a defined process with reliable execution. This section demonstrates processing a batch of puns using the Punderful application as an example.
+
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 import { Render, Tabs, TabItem, Stream, Card } from "~/components";

src/content/docs/learning-paths/workflows-course/series/workflows-3.mdx

@@ -4,6 +4,8 @@ title: Use cron triggers to develop time-aware applications
 sidebar:
   order: 3
 tableOfContents: false
+description: |
+  Cloudflare Workflows provide a powerful way to manage asynchronous, durable processes. The ability to explicitly schedule tasks using cron triggers and pause execution with `step.sleep` allows developers to build sophisticated, time-aware applications.
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 import { Render, Tabs, TabItem, Stream, Card } from "~/components";