Update docker base image to 2021.09.0 (#56191)

build.json

@@ -2,11 +2,11 @@
   "image": "homeassistant/{arch}-homeassistant",
   "shadow_repository": "ghcr.io/home-assistant",
   "build_from": {
-    "aarch64": "ghcr.io/home-assistant/aarch64-homeassistant-base:2021.08.0",
-    "armhf": "ghcr.io/home-assistant/armhf-homeassistant-base:2021.08.0",
-    "armv7": "ghcr.io/home-assistant/armv7-homeassistant-base:2021.08.0",
-    "amd64": "ghcr.io/home-assistant/amd64-homeassistant-base:2021.08.0",
-    "i386": "ghcr.io/home-assistant/i386-homeassistant-base:2021.08.0"
+    "aarch64": "ghcr.io/home-assistant/aarch64-homeassistant-base:2021.09.0",
+    "armhf": "ghcr.io/home-assistant/armhf-homeassistant-base:2021.09.0",
+    "armv7": "ghcr.io/home-assistant/armv7-homeassistant-base:2021.09.0",
+    "amd64": "ghcr.io/home-assistant/amd64-homeassistant-base:2021.09.0",
+    "i386": "ghcr.io/home-assistant/i386-homeassistant-base:2021.09.0"
   },
   "labels": {
     "io.hass.type": "core",
@@ -19,4 +19,4 @@
     "org.opencontainers.image.licenses": "Apache License 2.0"
   },
   "version_tag": true
-}
+}
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