programs/zsh: properly escape shell aliases

Otherwise all aliases break that use single quotes inside.

Already fixed in the nixpkgs module in 1e211a70cbdaf230a18ea4cb67a959039d5c2ddb.

(cherry picked from commit 465d08d99f)

modules/programs/zsh.nix

@@ -15,7 +15,7 @@ let
   localVarsStr = config.lib.zsh.defineAll cfg.localVariables;
 
   aliasesStr = concatStringsSep "\n" (
-    mapAttrsToList (k: v: "alias ${k}='${v}'") cfg.shellAliases
+    mapAttrsToList (k: v: "alias ${k}=${lib.escapeShellArg v}") cfg.shellAliases
   );
 
   zdotdir = "$HOME/" + cfg.dotDir;