[no ci] Tweak Rust toolchain update schedule

renovate.json

@@ -102,9 +102,11 @@
       "matchDepNames": [
         "rust-nightly"
       ],
+      // Rustup components history updates at 2:00 UTC
+      // https://github.com/rust-lang/rustup-components-history/blob/7f196546c6b982e937b41f5d782bdbfcf06eb019/.github/workflows/rust.yml#L10
       "schedule": [
-        "* * 1 */3 *",
-        "* * 15 2-11/3 *"
+        "* 4-23 1 */3 *",
+        "* 4-23 15 2-11/3 *"
       ]
     }
   ],