run release workflows against newer Node version

When using NAPI to build for release purposes, it relies on `inquirer`,
which relies on `@inquirer/core` which relies on a modern Node version
to support `import { styleText } from 'node:util'`

We want to still make sure that CI / Integration Tests pass on Node v20
(which we currently do), so just bumping the prepare-release.yml,
release-insiders.yml and release.yml workflows.

If this isn't enough, I'll properly drop the `@napi-rs/cli` version or
force an `inquirer`/`@inquirer/core` version. Let's try this first.

.github/workflows/prepare-release.yml

@@ -8,7 +8,7 @@ on:
 
 env:
   APP_NAME: tailwindcss-oxide
-  NODE_VERSION: 20
+  NODE_VERSION: 25
   OXIDE_LOCATION: ./crates/node
 
 permissions:

.github/workflows/release-insiders.yml

@@ -9,7 +9,7 @@ permissions:
 
 env:
   APP_NAME: tailwindcss-oxide
-  NODE_VERSION: 20
+  NODE_VERSION: 25
   OXIDE_LOCATION: ./crates/node
   RELEASE_CHANNEL: insiders
 

.github/workflows/release.yml

@@ -10,7 +10,7 @@ permissions:
 
 env:
   APP_NAME: tailwindcss-oxide
-  NODE_VERSION: 20
+  NODE_VERSION: 25
   OXIDE_LOCATION: ./crates/node
 
 jobs: