fix: Replace /blog/swr-v1 with /blog on index pages (#440)

Replace `/blog/swr-v1` with `/blog`

* Replace `/blog/swr-v1` with `/blog` in all mdx files that this link existed
* Removed empty new line in `index.en-US.mdx`

Author: ctcooper

pages/index.en-US.mdx

@@ -11,7 +11,6 @@ import { Bleed } from 'nextra-theme-docs'
 }
 {<h1 className="text-center text-4xl tracking-tighter font-extrabold md:text-5xl mt-8">SWR</h1>}
 
-
 <Bleed><Features/></Bleed>
 
 The name “SWR” is derived from `stale-while-revalidate`, a HTTP cache invalidation strategy popularized by [HTTP RFC 5861](https://tools.ietf.org/html/rfc5861).
@@ -23,7 +22,7 @@ SWR is a strategy to first return the data from cache (stale), then send the fet
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [Get Started](/docs/getting-started) · [Examples](/examples/basic) · [Blog](/blog/swr-v1) · [GitHub Repository](https://github.com/vercel/swr)
+  [Get Started](/docs/getting-started) · [Examples](/examples/basic) · [Blog](/blog) · [GitHub Repository](https://github.com/vercel/swr)
 </div>
 
 ## Overview

pages/index.es-ES.mdx

@@ -24,7 +24,7 @@ SWR es una estrategia para devolver primero los datos en caché (obsoletos), lue
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [Get Started](/docs/getting-started) · [Examples](/examples/basic) · [Blog](/blog/swr-v1) · [GitHub Repository](https://github.com/vercel/swr)
+  [Get Started](/docs/getting-started) · [Examples](/examples/basic) · [Blog](/blog) · [GitHub Repository](https://github.com/vercel/swr)
 </div>
 
 ## Resumen

pages/index.ja.mdx

@@ -24,7 +24,7 @@ SWR は、まずキャッシュからデータを返し（stale）、次にフ
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [はじめに](/docs/getting-started) · [例題](/examples/basic) · [ブログ](/blog/swr-v1) · [GitHub リポジトリ](https://github.com/vercel/swr)
+  [はじめに](/docs/getting-started) · [例題](/examples/basic) · [ブログ](/blog) · [GitHub リポジトリ](https://github.com/vercel/swr)
 </div>
 
 ## 概要

pages/index.ko.mdx

@@ -22,7 +22,7 @@ SWR은 먼저 캐시(스태일)로부터 데이터를 반환한 후, fetch 요
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [시작하기](/docs/getting-started) · [예시](/examples/basic) · [블로그](/blog/swr-v1) · [GitHub 리포지터리](https://github.com/vercel/swr)
+  [시작하기](/docs/getting-started) · [예시](/examples/basic) · [블로그](/blog) · [GitHub 리포지터리](https://github.com/vercel/swr)
 </div>
 
 ## 개요

pages/index.pt-BR.mdx

@@ -22,7 +22,7 @@ SWR é a estratégia de primeiro retornar os dados do cache (stale), depois envi
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [Comece a Usar](/docs/getting-started) · [Exemplos](/examples/basic) · [Blog](/blog/swr-v1) · [Repositório do GitHub](https://github.com/vercel/swr)
+  [Comece a Usar](/docs/getting-started) · [Exemplos](/examples/basic) · [Blog](/blog) · [Repositório do GitHub](https://github.com/vercel/swr)
 </div>
 
 ## Visão geral

pages/index.ru.mdx

@@ -23,7 +23,7 @@ import { Bleed } from 'nextra-theme-docs'
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [Начать работу](/docs/getting-started) · [Примеры](/examples/basic) · [Блог](/blog/swr-v1) · [Репозиторий GitHub](https://github.com/vercel/swr)
+  [Начать работу](/docs/getting-started) · [Примеры](/examples/basic) · [Блог](/blog) · [Репозиторий GitHub](https://github.com/vercel/swr)
 </div>
 
 ## Обзор

pages/index.zh-CN.mdx

@@ -23,7 +23,7 @@ import { Bleed } from 'nextra-theme-docs'
 </Callout>
 
 <div className="mt-16 mb-20 text-center">
-  [入门](/docs/getting-started) · [示例](/examples/basic) · [博客](/blog/swr-v1) · [GitHub 仓库](https://github.com/vercel/swr)
+  [入门](/docs/getting-started) · [示例](/examples/basic) · [博客](/blog) · [GitHub 仓库](https://github.com/vercel/swr)
 </div>
 
 ## 概览