build(deps): bump alpine from 3.13.3 to 3.13.4

Bumps alpine from 3.13.3 to 3.13.4.

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

Dockerfile

@@ -20,7 +20,7 @@ COPY . .
 
 RUN make release-binary
 
-FROM alpine:3.13.3 AS gomplate
+FROM alpine:3.13.4 AS gomplate
 
 ARG TARGETOS
 ARG TARGETARCH
@@ -33,7 +33,7 @@ RUN wget -O /usr/local/bin/gomplate \
   && chmod +x /usr/local/bin/gomplate
 
 
-FROM alpine:3.13.3
+FROM alpine:3.13.4
 
 # Dex connectors, such as GitHub and Google logins require root certificates.
 # Proper installations should manage those certificates, but it's a bad user