Update Apprise to 0.9.7

docker/alpine-base.dockerfile

@@ -4,5 +4,5 @@ WORKDIR /app
 
 # Install apprise, iputils for non-root ping, setpriv
 RUN apk add --no-cache iputils setpriv dumb-init python3 py3-cryptography py3-pip py3-six py3-yaml py3-click py3-markdown py3-requests py3-requests-oauthlib && \
-    pip3 --no-cache-dir install apprise==0.9.6 && \
+    pip3 --no-cache-dir install apprise==0.9.7 && \
     rm -rf /root/.cache

docker/debian-base.dockerfile

@@ -8,5 +8,5 @@ WORKDIR /app
 RUN apt update && \
     apt --yes --no-install-recommends install python3 python3-pip python3-cryptography python3-six python3-yaml python3-click python3-markdown python3-requests python3-requests-oauthlib \
         sqlite3 iputils-ping util-linux dumb-init && \
-    pip3 --no-cache-dir install apprise==0.9.6 && \
+    pip3 --no-cache-dir install apprise==0.9.7 && \
     rm -rf /var/lib/apt/lists/*