chore(deps): update go-toolchain (#779)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [go](https://go.dev/)
([source](https://redirect.github.com/golang/go)) | | minor | `1.24.0` →
`1.26.4` |
| registry.access.redhat.com/ubi9/go-toolset | stage | minor | `1.24.6`
→ `1.26.3` |

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: mangelajo

.go-version

@@ -1 +1 @@
-1.24.0
+1.26.4

controller/Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM registry.access.redhat.com/ubi9/go-toolset:1.24.6 AS builder
+FROM registry.access.redhat.com/ubi9/go-toolset:1.26.3@sha256:430cd439ea3bb4af3727a843c0302594bb1973211ecbfc98e4450a40798075df AS builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG GIT_VERSION=unknown

controller/Dockerfile.operator

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM registry.access.redhat.com/ubi9/go-toolset:1.24.6 AS builder
+FROM registry.access.redhat.com/ubi9/go-toolset:1.26.3@sha256:430cd439ea3bb4af3727a843c0302594bb1973211ecbfc98e4450a40798075df AS builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG GIT_VERSION=unknown