powershell: 6.1.1 -> 6.1.2

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/powershell/versions

pkgs/shells/powershell/default.nix

@@ -5,7 +5,7 @@ let platformString = if stdenv.isDarwin then "osx"
                      else if stdenv.isLinux then "linux"
                      else throw "unsupported platform";
     platformSha = if stdenv.isDarwin then "1zm5q25ny2x6wvdqfrc380467zq0nbrzh2rzldwdkdpkb6wbvpj8"
-                     else if stdenv.isLinux then "0wh5vvh8pk75fy37bm5av4xvp76slqyjhb6a0al55vw9rlg5q3xw"
+                     else if stdenv.isLinux then "021ag632jcn7f1vpddann04xifgsq3wrx93hzbvq7cngg8y16r3y"
                      else throw "unsupported platform";
     platformLdLibraryPath = if stdenv.isDarwin then "DYLD_FALLBACK_LIBRARY_PATH"
                      else if stdenv.isLinux then "LD_LIBRARY_PATH"
@@ -15,7 +15,7 @@ let platformString = if stdenv.isDarwin then "osx"
 in
 stdenv.mkDerivation rec {
   name = "powershell-${version}";
-  version = "6.1.1";
+  version = "6.1.2";
 
   src = fetchzip {
     url = "https://github.com/PowerShell/PowerShell/releases/download/v${version}/powershell-${version}-${platformString}-x64.tar.gz";