Use python 3.12 on Netlify and CI (#4375)

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ on:
 
 permissions:
   contents: read
-  
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
@@ -24,10 +24,10 @@ jobs:
       with:
           repo: cloudcannon/pagefind
     - uses: actions/checkout@v4.2.1
-    - name: Set up Python 3.8
+    - name: Set up Python 3.12
       uses: actions/setup-python@v5
       with:
-        python-version: 3.8
+        python-version: 3.12
     - name: Install dependencies
       run: pip install -r requirements.txt -r requirements_test.txt
     - name: Register problem matchers

netlify.toml

@@ -1,7 +1,7 @@
 [build]
   publish = "_build/html"
   command = "make netlify"
-  environment = { BASE_URL = "https://esphome.io" }
+  environment = { BASE_URL = "https://esphome.io", PYTHON_VERSION = "3.12" }
 
 [context.beta]
   environment = { BASE_URL = "https://beta.esphome.io" }