deal with deprecated settings in home manager

users/alice/home.nix

@@ -163,6 +163,7 @@
     userDirs = {
       enable = true;
       createDirectories = true;
+      setSessionVariables = true;
       extraConfig = {
         SCREENSHOTS = "${config.xdg.userDirs.pictures}/Screenshots";
       };

users/alice/home/git.nix

@@ -6,6 +6,7 @@
     lfs.enable = true;
     signing = {
       key = "5EFFB75F7C9B74EAA5C4637547940175096C1330";
+      format = "openpgp";
       signByDefault = true;
     };
     settings = {
@@ -14,6 +15,7 @@
       color.ui = true;
       init.defaultBranch = "main";
       format.signoff = true;
+      format.commitMessage = "signed-off-by";
       pack.windowMemory = "2g";
       pack.packSizeLimit = "1g";
       user.email = "aliceghuston@gmail.com";