tink-docker: Update dind image

Signed-off-by: Manuel Mendez <github@i.m.mmlb.dev>

Author: mmlb

tink-docker/Dockerfile

@@ -8,7 +8,7 @@ RUN --mount=type=cache,sharing=locked,id=gomod,target=/go/pkg/mod/cache \
     --mount=type=cache,sharing=locked,id=goroot,target=/root/.cache/go-build \
     CGO_ENABLED=0 go build -a -ldflags '-w -extldflags "-static"' -o /tink-docker
 
-FROM docker:20.10.14-dind
+FROM docker:20.10.15-dind
 RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
 RUN apk update; apk add kexec-tools
 COPY --from=dev /tink-docker .