Fix some typos.

debian/changelog

@@ -11,7 +11,7 @@ tails (1.5) unstable; urgency=medium
       · Disable Tiles in all browsers' new tab page.
       · Don't use geo-specific search engine prefs in our browsers.
       · Hide Tools -> Set Up Sync, Tools -> Apps (that links to the Firefox
-        Marketplace, and the "Share this page" button in the Tool bar.
+        Marketplace), and the "Share this page" button in the Tool bar.
       · Generate localized Wikipedia search engine plugin icons so the
         English and localized versions can be distinguished in the new
         search bar. (Closes: #9955)
@@ -70,7 +70,7 @@ tails (1.5) unstable; urgency=medium
       · One can now inspect how much space is used, at a given time, in the
         read-write branch of the root filesystem's union mount.
       · We can make sure our AppArmor policy works fine when that filesystem
-        is visible, which is safer in case e.g. live-boot's behavior change
+        is visible, which is safer in case e.g. live-boot's behavior changes
         under our feet in the future... or in case these "hidden" files are
         actually accessible somehow already.