[Cache] Adds Cache change log

src/content/changelogs/cache.yaml

@@ -0,0 +1,26 @@
+---
+link: "/cache/changelog/"
+productName: Cache
+productLink: "/cache/"
+productArea: Application performance
+productAreaLink: /fundamentals/reference/changelog/performance/
+entries:
+  - publish_date: "2024-11-07"
+    title: Shard Cache by cache key
+    description: |-
+      For custom cache keys, enterprise customers can now shard their cache using up to three values for previously restricted headers `accept*`, `referer`, and `user-agent`. Sharding the cache can improve cache `HIT` ratio and performance. However, overly sharding your cache, can have the opposite effect.
+
+  - publish_date: "2024-11-07"
+    title: Versioning
+    description: |-
+      Cache now supports versioned environments allowing customers to stage configurations and purge staged environments. Note that Cache Reserve is only supported for your production environment.
+
+  - publish_date: "2024-09-05"
+    title: New Cache Rules templates for one-click rule creation
+    description: |-
+      The new **Rules** > **Templates** page in the Cloudflare dashboard provides one-click templates for creating cache rules, making it easy to optimize your caching strategy. Access these pre-built templates directly from each product's rule builder, and explore the [Examples gallery](/rules/examples/) in the developer documentation for real-world use cases.
+
+  - publish_date: "2024-07-19"
+    title: Generic tiered cache
+    description: |-
+      [Generic Global Tiered Cache](/cache/how-to/tiered-cache/#generic-global-tiered-cache) topology leverages all Cloudflare data centers as upper-tier cache network. It now hashes content within a region reducing duplication in upper-tier caches, which increases cache `HIT` ratio.

src/content/docs/cache/changelog.mdx

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+---
+pcx_content_type: changelog
+title: Changelog
+changelog_file_name:
+  - cache
+sidebar:
+  order: 12
+---
+
+import { ProductChangelog } from "~/components";
+
+{/* <!-- Actual content lives in /src/content/changelogs/cache.yaml. Update the file there for new entries to appear here. For more details, refer to https://developers.cloudflare.com/style-guide/documentation-content-strategy/content-types/changelog/#yaml-file --> */}
+
+<ProductChangelog />