fix: Update typings for Deno.errors namespace (#19688)

Follow up to https://github.com/denoland/deno/pull/19514, where I forgot
to update type declarations.

cli/tests/integration/lsp_tests.rs

@@ -4788,7 +4788,7 @@ fn lsp_completions_auto_import() {
         "source": "./b.ts",
         "data": {
           "exportName": "foo",
-          "exportMapKey": "foo|6812|file:///a/b",
+          "exportMapKey": "foo|6820|file:///a/b",
           "moduleSpecifier": "./b.ts",
           "fileName": "file:///a/b.ts"
         },

cli/tsc/dts/lib.deno.ns.d.ts

@@ -261,6 +261,29 @@ declare namespace Deno {
      *
      * @category Errors */
     export class NotSupported extends Error {}
+    /**
+     * Raised when too many symbolic links were encountered when resolving the
+     * filename.
+     *
+     * @category Errors */
+    export class FilesystemLoop extends Error {}
+    /**
+     * Raised when trying to open, create or write to a directory.
+     *
+     * @category Errors */
+    export class IsADirectory extends Error {}
+    /**
+     * Raised when performing a socket operation but the remote host is
+     * not reachable.
+     *
+     * @category Errors */
+    export class NetworkUnreachable extends Error {}
+    /**
+     * Raised when trying to perform an operation on a path that is not a
+     * directory, when directory is required.
+     *
+     * @category Errors */
+    export class NotADirectory extends Error {}
   }
 
   /** The current process ID of this instance of the Deno CLI.