chore: disable Renovate's digest updates (#1747)

## PR Checklist

- [x] Addresses an existing open issue: temporarily reprieves #1742, but
does not resolve it
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Just disables the most common problematic updates for this repo.

💖

Author: JoshuaKGoldberg

.github/renovate.json

@@ -1,6 +1,7 @@
 {
 	"$schema": "https://docs.renovatebot.com/renovate-schema.json",
 	"automerge": true,
+	"digest": { "enabled": false },
 	"extends": ["config:best-practices", "replacements:all"],
 	"ignoreDeps": ["codecov/codecov-action"],
 	"labels": ["dependencies"],

script/__snapshots__/migrate-test-e2e.ts.snap

@@ -1,5 +1,18 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
+exports[`expected file changes > .github/renovate.json 1`] = `
+"--- a/.github/renovate.json
++++ b/.github/renovate.json
+@@ ... @@
+ {
+ 	"$schema": "https://docs.renovatebot.com/renovate-schema.json",
+ 	"automerge": true,
+-	"digest": { "enabled": false },
+ 	"extends": ["config:best-practices", "replacements:all"],
+ 	"ignoreDeps": ["codecov/codecov-action"],
+ 	"labels": ["dependencies"],"
+`;
+
 exports[`expected file changes > .github/workflows/ci.yml 1`] = `
 "--- a/.github/workflows/ci.yml
 +++ b/.github/workflows/ci.yml

script/migrate-test-e2e.ts

@@ -7,6 +7,7 @@ import { assert, describe, expect, test } from "vitest";
 const filesExpectedToBeChanged = [
 	"README.md",
 	"knip.json",
+	".github/renovate.json",
 	".github/workflows/ci.yml",
 	".gitignore",
 	".prettierignore",