fix: add /.all-contributorsrc back to .prettierignore again (#2004)

## PR Checklist

- [x] Addresses an existing open issue: fixes #2001
- [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

Similar to #838.

🎁

Author: JoshuaKGoldberg

.prettierignore

@@ -1,3 +1,4 @@
+/.all-contributorsrc
 /.husky
 /coverage
 /lib

src/blocks/blockAllContributors.test.ts

@@ -11,6 +11,14 @@ describe("blockAllContributors", () => {
 		expect(creation).toMatchInlineSnapshot(`
 			{
 			  "addons": [
+			    {
+			      "addons": {
+			        "ignores": [
+			          "/.all-contributorsrc",
+			        ],
+			      },
+			      "block": [Function],
+			    },
 			    {
 			      "addons": {
 			        "badges": [
@@ -104,6 +112,14 @@ describe("blockAllContributors", () => {
 		expect(creation).toMatchInlineSnapshot(`
 			{
 			  "addons": [
+			    {
+			      "addons": {
+			        "ignores": [
+			          "/.all-contributorsrc",
+			        ],
+			      },
+			      "block": [Function],
+			    },
 			    {
 			      "addons": {
 			        "badges": [

src/blocks/blockAllContributors.ts

@@ -2,6 +2,7 @@ import _ from "lodash";
 
 import { base, Contributor } from "../base.js";
 import { ownerContributions } from "../data/contributions.js";
+import { blockPrettier } from "./blockPrettier.js";
 import { blockREADME } from "./blockREADME.js";
 import { blockRepositorySecrets } from "./blockRepositorySecrets.js";
 import { createSoloWorkflowFile } from "./files/createSoloWorkflowFile.js";
@@ -15,6 +16,9 @@ export const blockAllContributors = base.createBlock({
 		const contributions = options.contributors?.length;
 		return {
 			addons: [
+				blockPrettier({
+					ignores: ["/.all-contributorsrc"],
+				}),
 				blockREADME({
 					badges: [
 						`<!-- prettier-ignore-start -->

src/blocks/blockCTATransitions.test.ts

@@ -62,7 +62,7 @@ describe("blockCTATransitions", () => {
 			      "addons": {
 			        "properties": {
 			          "devDependencies": {
-			            "create-typescript-app": "2.7.3",
+			            "create-typescript-app": "2.8.0",
 			          },
 			        },
 			      },