Bump python from 3.9.1-alpine3.12 to 3.9.2-alpine3.12

Bumps python from 3.9.1-alpine3.12 to 3.9.2-alpine3.12.

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.9.1-alpine3.12
+FROM python:3.9.2-alpine3.12
 COPY requirements.txt dht22mqtt.py gpiomapping.py ./
 RUN apk add gcc musl-dev && \
     pip3 install -r requirements.txt --no-cache-dir && \