ci: Bump actions/setup-go from 5.6.0 to 6.4.0

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 5.6.0 to 6.4.0.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@40f1582...4a36011)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
         python -m pip install "debugpy==1.8.14"
 
     - name: Setup Go
-      uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff  # v5
+      uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c  # v6.4.0
       with:
         go-version: '1.21'
 

.github/workflows/release.yml

@@ -49,7 +49,7 @@ jobs:
         pip install "debugpy==1.8.14"
 
     - name: Setup Go
-      uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff  # v5
+      uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c  # v6.4.0
       with:
         go-version: '1.21'