Bump actions/setup-go from 2 to 3 (#600)

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 2 to 3.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v2...v3)

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

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

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

.github/workflows/run-pfcp-agent-unit-test.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-go@v2
+      - uses: actions/setup-go@v3
 
       - name: Run unit tests for PFCP Agent
         run: |

.github/workflows/test-integration.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-go@v2
+      - uses: actions/setup-go@v3
         with:
           go-version: '1.16'
       - name: Run integration tests for PFCP Agent & UP4
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-go@v2
+      - uses: actions/setup-go@v3
         with:
           go-version: '1.16'
       - name: Run integration tests for PFCP Agent & UP4