ci: update go version

Go 1.17.x will be removed and 1.20.x set as default in the GitHub action
virtual environment on April 3, 2023.

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go-version: [1.17.x, 1.18.x, 1.19.x]
+        go-version: [1.18.x, 1.19.x, 1.20.x]
         criu_branch: [master, criu-dev]
 
     steps:
@@ -24,7 +24,7 @@ jobs:
         sudo make -C criu install-criu PREFIX=/usr
 
     - name: install go ${{ matrix.go-version }}
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go-version }}
 
@@ -54,7 +54,7 @@ jobs:
         sudo make -C test crit-test
 
     - name: Check code coverage
-      if: matrix.go-version == '1.19.x' && matrix.criu_branch == 'criu-dev'
+      if: matrix.go-version == '1.20.x' && matrix.criu_branch == 'criu-dev'
       run: |
         # Run actual test as root as it uses CRIU.
         sudo env "PATH=$PATH" make coverage