build(deps): bump actions/setup-go from 6.2.0 to 6.4.0 (prometheus#3598)

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 6.2.0 to 6.4.0.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@7a3fe6c...4a36011)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-version: 6.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
+      - uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version: 1.26.x
       - run: uname -a

.github/workflows/golangci-lint.yml

@@ -30,7 +30,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Install Go
-        uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
+        uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
           go-version: 1.26.x
       - name: Install snmp_exporter/generator dependencies