Merge pull request #6141 from backstage/software-catalog-rename

Docs: Update references to "service catalog"

docs/plugins/index.md

@@ -28,9 +28,9 @@ This helps the community know what plugins are in development.
 You can also use this process if you have an idea for a good plugin but you hope
 that someone else will pick up the work.
 
-## Integrate into the Service Catalog
+## Integrate into the Software Catalog
 
 If your plugin isn't supposed to live as a standalone page, but rather needs to
-be presented as a part of a Service Catalog (e.g. a separate tab or a card on an
-"Overview" tab), then check out
-[the instruction](integrating-plugin-into-service-catalog.md) on how to do it.
+be presented as a part of a Software Catalog (e.g. a separate tab or a card on
+an "Overview" tab), then check out
+[the instruction](integrating-plugin-into-software-catalog.md) on how to do it.

docs/plugins/integrating-plugin-into-software-catalog.md

@@ -1,7 +1,7 @@
 ---
-id: integrating-plugin-into-service-catalog
-title: Integrate into the Service Catalog
-description: How to integrate a plugin into service catalog
+id: integrating-plugin-into-software-catalog
+title: Integrate into the Software Catalog
+description: How to integrate a plugin into software catalog
 ---
 
 > This is an advanced use case and currently is an experimental feature. Expect