Release preparations for 9.5a7

Versions bump and Changelog update

projects/firefox/config

 # vim: filetype=yaml sw=2
 version: '[% c("abbrev") %]'
 filename: 'firefox-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %]'
-git_hash: 'tor-browser-[% c("var/firefox_version") %]-[% c("var/torbrowser_branch") %]-1-build3'
+git_hash: 'tor-browser-[% c("var/firefox_version") %]-[% c("var/torbrowser_branch") %]-1-build4'
 tag_gpg_id: 1
 git_url: https://git.torproject.org/tor-browser.git
 git_submodule: 1

projects/tor-browser/Bundle-Data/Docs/ChangeLog.txt

+Tor Browser 9.5a7 -- March 6 2020
+ * All Platforms
+   * Translations update
+ * Windows + OS X + Linux
+   * Update Tor Launcher to 0.2.21.3
+     * Translations update
+     * Bug 33514: non-en-US Tor Browser 9.5a6 won't start up
+
 Tor Browser 9.5a6 -- February 27 2020
  * All Platforms
    * Translations update

projects/tor-launcher/config

 # vim: filetype=yaml sw=2
-version: 0.2.21.2
+version: 0.2.21.3
 git_url: https://git.torproject.org/tor-launcher.git
 git_hash: '[% c("version") %]'
 gpg_keyring: torbutton.gpg

rbm.conf

@@ -24,11 +24,12 @@ buildconf:
   git_signtag_opt: '-s'
 
 var:
-  torbrowser_version: '9.5a6'
+  torbrowser_version: '9.5a7'
   torbrowser_build: 'build1'
   torbrowser_incremental_from:
     - 9.5a4
     - 9.5a5
+    - 9.5a6
   project_name: tor-browser
   multi_lingual: 0
   build_mar: 1