fix: tool/codegen/Dockerfile to reduce vulnerabilities (#6304)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-DEBIAN13-PCRE2-12206155
- https://snyk.io/vuln/SNYK-DEBIAN13-OPENSSL-13174592
- https://snyk.io/vuln/SNYK-DEBIAN13-OPENSSL-13174592
- https://snyk.io/vuln/SNYK-DEBIAN13-OPENSSL-13174602
- https://snyk.io/vuln/SNYK-DEBIAN13-OPENSSL-13174605

Signed-off-by: Shinnosuke Sawada-Dazai <shin@warashi.dev>
Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: caniszczyk

tool/codegen/Dockerfile

@@ -1,13 +1,13 @@
 # Builder image to build go program.
-FROM golang:1.25.0 AS builder
+FROM golang:1.25.2 AS builder
 
 COPY protoc-gen-auth /protoc-gen-auth
 RUN cd /protoc-gen-auth \
   && go build -o /usr/local/bin/protoc-gen-auth . \
   && chmod +x /usr/local/bin/protoc-gen-auth
 
 # Codegen image which is actually being used.
-FROM golang:1.25.0
+FROM golang:1.25.2
 
 # This is version of protobuf installed in the image.
 # See https://pkgs.alpinelinux.org/packages?name=protobuf&branch=v3.16