fix: update changeset files

Signed-off-by: Camila Belo <camilaibs@gmail.com>

.changeset/chilly-terms-behave.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-search-backend-module-stack-overflow': patch
+---
+
+Extract a package for the Stack Overflow new backend system plugin.

.changeset/giant-cycles-end.md

@@ -2,6 +2,6 @@
 '@backstage/plugin-stack-overflow-backend': patch
 ---
 
-Migrate package to the new Frontend system, the new module is distributed with a `/alpha` subpath.
+Deprecate package in favor of the new `@backstage/plugin-search-backend-module-stack-overflow` module.
 
-The search collator `requestParams` option is optional now, so its defaults to `{ order: 'desc', sort: 'activity', site: 'stackoverflow' }` as done in the `Try It` section on the [official Stack Overflow API documentation](https://api.stackexchange.com/docs/questions).
+The search collator `requestParams` option is optional now, so its default value is `{ order: 'desc', sort: 'activity', site: 'stackoverflow' }` as defined in the `Try It` section on the [official Stack Overflow API documentation](https://api.stackexchange.com/docs/questions).

.changeset/mean-fans-cough.md

@@ -1,5 +0,0 @@
----
-'@backstage/plugin-search': patch
----
-
-Add Stack Overflow type to the default alpha search page extension types filter.

.changeset/nice-pillows-poke.md

@@ -2,4 +2,4 @@
 '@backstage/plugin-stack-overflow': patch
 ---
 
-Migrate package to the new Backend system, the new module is distributed with a `/alpha` subpath.
+Migrate package to the new Frontend system, the new module is distributed with a `/alpha` subpath.