Ensure SPA HTML files get loaded with UTF-8 encoding

Fixes issues with wrong encoding of the "Loading Funkwhale…" text in index.html

api/funkwhale_api/common/middleware.py

@@ -128,6 +128,7 @@ def get_spa_file(spa_url, name):
 
     response = session.get_session().get(utils.join_url(spa_url, name),)
     response.raise_for_status()
+    response.encoding = "utf-8"
     content = response.text
     caches["local"].set(cache_key, content, settings.FUNKWHALE_SPA_HTML_CACHE_DURATION)
     return content

changes/changelog.d/index-html-encoding.bugfix

@@ -0,0 +1 @@
+Ensure index.html files get loaded with UTF-8 encoding