ci(deps): update init-toolbox (#12)

| datasource | package | from | to   |
| ---------- | ------- | ---- | ---- |
| docker     | golang  | 1.20 | 1.21 |

Co-authored-by: Renovate Bot <135047802+graphops-renovate[bot]@users.noreply.github.com>

dockerfiles/init-toolbox/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-alpine@sha256:7839c9f01b5502d7cb5198b2c032857023424470b3e31ae46a8261ffca72912a
+FROM golang:1.21-alpine@sha256:110b07af87238fbdc5f1df52b00927cf58ce3de358eeeb1854f10a8b5e5e1411
 
 ENV DOWNLOAD_MANAGER_REF="main"
 
@@ -8,7 +8,7 @@ RUN apk add --no-cache git && \
     go get github.com/vbauerster/getparty && \
     CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -a -installsuffix cgo -o download-manager .
 
-FROM alpine:3.18@sha256:82d1e9d7ed48a7523bdebc18cf6290bdb97b82302a8a9c27d4fe885949ea94d1
+FROM alpine:3.18@sha256:eece025e432126ce23f223450a0326fbebde39cdf496a85d8c016293fc851978
 WORKDIR /
 RUN apk add --no-cache curl aria2
 COPY --from=0 /go/src/gnosischain/download-manager/download-manager /download-manager