chore: clarified that changes are breaking

Signed-off-by: Johan Haals <johan.haals@gmail.com>

.changeset/fair-kangaroos-return.md

@@ -2,7 +2,7 @@
 '@backstage/backend-plugin-api': minor
 ---
 
-Delete deprecated url reader exports:
+**BREAKING** Deleted the following deprecated `UrlReader` exports
 
 - ReadUrlOptions: Use `UrlReaderServiceReadUrlOptions` instead;
 - ReadUrlResponse: Use `UrlReaderServiceReadUrlResponse` instead;

.changeset/lovely-ravens-judge.md

@@ -2,7 +2,7 @@
 '@backstage/backend-common': minor
 ---
 
-Removed the following `Url Reader` deprecated exports:
+**BREAKING**: Removed the following `Url Reader` deprecated exports:
 
 - UrlReader: Use `UrlReaderService` from `@backstage/backend-plugin-api` instead;
 - AzureUrlReader: Import from `@backstage/backend-defaults/urlReader` instead;