renovate: pin two more deps for Node reasons (#7972)

renovate.json5

@@ -125,5 +125,18 @@
       matchPackageNames: ["rollup"],
       allowedVersions: "4.x",
     },
+    // eslint@9 drops support for node v14. We can take this when we drop node v14 support.
+    {
+      matchPackageNames: ["eslint"],
+      allowedVersions: "8.x",
+    },
+    // uuid@10 drops support for node v14. We can take this when we drop node
+    // v14 support. (This isn't in the engines property, but they made this
+    // change in https://github.com/uuidjs/uuid/pull/750 and then later started
+    // using the new-in-v16 `??=` operator.)
+    {
+      matchPackageNames: ["uuid"],
+      allowedVersions: "9.x",
+    }
   ]
 }