fix: add frontmatter to docs changelog

Author: camschae

docs/guides/changelog.md

@@ -1,3 +1,12 @@
+---
+subcategory: "Guides"
+page_title: "Changelog"
+description: |-
+    Changelog
+---
+
+# Changelog
+
 ## 0.10.1
 
 - **BREAKING**: Rename `evpn_instance` to `evpn_instance_legacy` and `evpn_instance_vni` to `evpn_instance_vni_legacy` in `iosxe_vlan_configuration` resource for IOS-XE < 17.15
@@ -363,3 +372,4 @@
 ## 0.1.0
 
 - Initial release
+