Changelog: improve wording & fix a typo.

debian/changelog

@@ -13,7 +13,7 @@ tails (3.0.1) unstable; urgency=medium
       (Closes: #12510).
 
   * Bugfixes
-    - Forcibly set $SSH_eAUTH_SOCK before starting GNOME
+    - Forcibly set $SSH_AUTH_SOCK before starting GNOME
       Shell. Apparently, due to a race condition, GNOME keyring
       sometimes fails to tell the session manager about the correct
       SSH_AUTH_SOCK, and thus GNOME Terminal hasn't this variable set
@@ -21,7 +21,7 @@ tails (3.0.1) unstable; urgency=medium
       working) SSH agent (Closes: #12481).
     - Fix issue that made Tails Installer rejects working USB drives,
       pretending they're not "removable" (Closes: #12696).
-    - Make power button and lid close actions in the Greeter
+    - Make behavior of the power button and lid close actions in the Greeter
       consistent with the regular GNOME session (Closes: #13000).
 
   * Build system