Reduce length of some page descriptions

website/src/docs/guides/backups.md

@@ -1,6 +1,6 @@
 ---
 title: Backups
-description: Backups in Tachiyomi are compatible between different versions of the app, with a few exceptions listed under forks information.
+description: Backups helps you prevent losing your library if something happens.
 ---
 
 # Backups

website/src/docs/guides/local-series/index.md

@@ -1,6 +1,6 @@
 ---
 title: Local series
-description: If you like to download and organize your media, then you want to know how to manage your own series in Tachiyomi.
+description: For users who would like to download and organize their own media.
 ---
 
 # Local series

website/src/docs/guides/source-migration.md

@@ -1,6 +1,6 @@
 ---
 title: Source migration
-description: Migration is the process of moving series between sources without losing progress. This is most often used when a source is no longer accessible or another source is more up-to-date.
+description: Migration is the process of moving series between sources without losing progress.
 ---
 
 # Source migration

website/src/docs/guides/tracking.md

@@ -1,6 +1,6 @@
 ---
 title: Tracking
-description: Tracking helps you automatically send read chapters to supported trackers, so you can keep track of what and when you read it online.
+description: Tracking helps track your library with different online services.
 ---
 
 # Tracking

website/src/extensions/index.md

@@ -1,6 +1,6 @@
 ---
 title: Extensions
-description: Web-based extensions page that enables users to browse and install additional sources that provide access to a wide range of content from various websites.
+description: Browse and install the full list of sources for Tachiyomi.
 ---
 
 # Extensions