chore(deps): bump alpine from 3.13.3 to 3.13.5

Bumps alpine from 3.13.3 to 3.13.5.

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

Dockerfile

@@ -13,7 +13,7 @@ RUN go build -o /bin/chaoskube -v \
   -ldflags "-X main.version=$(git describe --tags --always --dirty) -w -s"
 
 # final image
-FROM alpine:3.13.3
+FROM alpine:3.13.5
 MAINTAINER Linki <linki+docker.com@posteo.de>
 
 RUN apk --no-cache add ca-certificates dumb-init tzdata