fix: incorrect upgrade command for package managers (tauri-apps#2491)

Author: chippers

src/content/docs/blog/tauri-2-0-0-release-candidate.mdx

@@ -62,7 +62,7 @@ You should be able to automatically migrate from the latest beta to release cand
 <CommandTabs
   npm="npm install @tauri-apps/cli@next
     npm run tauri migrate"
-  yarn="yarn upgrade @tauri-apps/cli --next
+  yarn="yarn upgrade @tauri-apps/cli@next
     yarn tauri migrate"
   pnpm="pnpm update @tauri-apps/cli@next
     pnpm tauri migrate"

src/content/docs/es/start/migrate/from-tauri-1.mdx

@@ -55,7 +55,7 @@ La CLI de Tauri v2 incluye un comando `migrate` que automatiza la mayor parte de
 <CommandTabs
   npm="npm install @tauri-apps/cli@next
     npm run tauri migrate"
-  yarn="yarn upgrade @tauri-apps/cli --next
+  yarn="yarn upgrade @tauri-apps/cli@next
     yarn tauri migrate"
   pnpm="pnpm update @tauri-apps/cli@next
     pnpm tauri migrate"

src/content/docs/fr/start/migrate/from-tauri-1.mdx

@@ -16,9 +16,9 @@ Tauri v2 contient la commande `migrate` qui simplifie votre migration:
 <CommandTabs
   npm="npm install @tauri-apps/cli@latest
     npm run tauri migrate"
-  yarn="yarn upgrade @tauri-apps/cli --latest
+  yarn="yarn upgrade @tauri-apps/cli@next
     yarn tauri migrate"
-  pnpm="pnpm update @tauri-apps/cli --latest
+  pnpm="pnpm update @tauri-apps/cli@next
     pnpm tauri migrate"
   cargo='cargo install tauri-cli --version "^2.0.0-rc"
     cargo tauri migrate'

src/content/docs/start/migrate/from-tauri-1.mdx

@@ -55,7 +55,7 @@ The Tauri v2 CLI includes a `migrate` command that automates most of the process
 <CommandTabs
   npm="npm install @tauri-apps/cli@next
     npm run tauri migrate"
-  yarn="yarn upgrade @tauri-apps/cli --next
+  yarn="yarn upgrade @tauri-apps/cli@next
     yarn tauri migrate"
   pnpm="pnpm update @tauri-apps/cli@next
     pnpm tauri migrate"

src/content/docs/start/migrate/from-tauri-2-beta.mdx

@@ -17,7 +17,7 @@ The Tauri v2 CLI includes a `migrate` command that automates most of the process
 <CommandTabs
   npm="npm install @tauri-apps/cli@next
     npm run tauri migrate"
-  yarn="yarn upgrade @tauri-apps/cli --next
+  yarn="yarn upgrade @tauri-apps/cli@next
     yarn tauri migrate"
   pnpm="pnpm update @tauri-apps/cli@next
     pnpm tauri migrate"

src/content/docs/zh-cn/start/migrate/from-tauri-1.mdx

@@ -56,7 +56,7 @@ Tauri v2 的命令行工具包括一个 `migrate` 命令，可自动执行大部
 <CommandTabs
   npm="npm install @tauri-apps/cli@next
     npm run tauri migrate"
-  yarn="yarn upgrade @tauri-apps/cli --next
+  yarn="yarn upgrade @tauri-apps/cli@next
     yarn tauri migrate"
   pnpm="pnpm update @tauri-apps/cli@next
     pnpm tauri migrate"