Fix typos in Changelog

Thanks cypherpunk.

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

@@ -49,12 +49,12 @@ Tor Browser 9.0a7 -- October 1 2019
      * Bug 31538: Windows bundles based on ESR 68 are not built reproducibly
      * Bug 31584: Clean up mingw-w64 project
      * Bug 31596: Bump mingw-w64 version to pick up fix for #31567
-     * Bug 39187: Bump NSIS version to 3.04
+     * Bug 29187: Bump NSIS version to 3.04
      * Bug 31732: Windows nightly builds are busted due to mingw-w64 commit bump
    * Linux
      * Bug 31448: gold and lld break linking 32bit Linux bundles
      * Bug 31618: linux32 builds of Tor Browser 9.0a6 are not matching
-     * Bug 31450: Use still GCC for our ASan builds
+     * Bug 31450: Still use GCC for our ASan builds
 
 Tor Browser 8.5.6 -- September 9 2019
  * Android