Bump golang from 1.22.3-alpine to 1.22.4-alpine in /build (#70)

Bumps golang from 1.22.3-alpine to 1.22.4-alpine.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.22.3-alpine as builder
+FROM golang:1.22.4-alpine as builder
 
 WORKDIR /code
 
@@ -11,7 +11,7 @@ COPY . .
 
 RUN go build -tags jsoniter -o bin/mailer cmd/main.go
 
-FROM golang:1.22.3-alpine
+FROM golang:1.22.4-alpine
 
 WORKDIR /code