deepspeech,stt: deprecate deepspeech in favor of stt

Mozilla fired the team and they founded a new company to continue their work

https://github.com/NixOS/nixpkgs/issues/119496

pkgs/top-level/aliases.nix

@@ -167,6 +167,7 @@ mapAliases ({
   deadpixi-sam = deadpixi-sam-unstable;
   debian_devscripts = debian-devscripts; # added 2016-03-23
   deepin = throw "deepin was a work in progress and it has been canceled and removed https://github.com/NixOS/nixpkgs/issues/94870"; # added 2020-08-31
+  deepspeech = throw "deepspeech was removed in favor of stt. https://github.com/NixOS/nixpkgs/issues/119496"; # added 2021-05-05
   desktop_file_utils = desktop-file-utils; # added 2018-02-25
   devicemapper = lvm2; # added 2018-04-25
   digikam5 = digikam; # added 2017-02-18

pkgs/top-level/all-packages.nix

@@ -28568,6 +28568,8 @@ in
 
   streamlit = python3Packages.callPackage ../applications/science/machine-learning/streamlit { };
 
+  stt = callPackage ../tools/audio/stt { };
+
   stuntrally = callPackage ../games/stuntrally {
     ogre = ogre1_9;
     mygui = mygui.override {
@@ -30066,8 +30068,6 @@ in
 
   dbus-map = callPackage ../tools/misc/dbus-map { };
 
-  deepspeech = callPackage ../misc/deepspeech { };
-
   dell-530cdn = callPackage ../misc/drivers/dell-530cdn {};
 
   demjson = with python3Packages; toPythonApplication demjson;