Bump actions/setup-go from 5 to 6

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 5 to 6.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-go
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/testing.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
 
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
 
@@ -50,7 +50,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
 
@@ -70,7 +70,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}