CI: use setup-go@v5

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

.github/workflows/test.yml

@@ -46,7 +46,7 @@ jobs:
       - name: Test (shared mode)
         run: ./test/test.sh /var/run/socket_vmnet
 # Bridged mode cannot be tested on GHA
-      - uses: actions/setup-go@v3
+      - uses: actions/setup-go@v5
         with:
           go-version: 1.20.x
       - name: Install Lima