build(deps): Bump golang in /cmd/fluent-manager (#1369)

Bumps golang from 1.22.6-alpine3.19 to 1.23.2-alpine3.19.

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

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

Author: dependabot[bot]

cmd/fluent-manager/Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM --platform=$BUILDPLATFORM golang:1.22.6-alpine3.19 as builder
+FROM --platform=$BUILDPLATFORM golang:1.23.2-alpine3.19 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests