Group acorn and espree update (#18902)

.github/renovate.json5

@@ -55,6 +55,10 @@
       groupName: "Angular Estree parser",
       matchPackageNames: ["@angular/compiler", "angular-estree-parser"],
     },
+    {
+      groupName: "Acorn and Espree",
+      matchPackageNames: ["acorn", "acorn-jsx", "espree"],
+    },
     {
       groupName: "Regex related dependencies",
       matchPackageNames: ["regexp-util", "unicode-regex", "cjk-regex"],