bump up golang v1.17

Signed-off-by: Wang Yan <wangyan@vmware.com>

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: ["1.15.x", "1.16.x"]
+        go-version: ["1.16.x", "1.17.x"]
         platform: ["ubuntu-latest"]
     runs-on: ${{ matrix.platform }}
     env:
@@ -40,7 +40,7 @@ jobs:
       run: |
           sudo apt-get -q update
           sudo -E apt-get -yq --no-install-suggests --no-install-recommends install python2-minimal
-          cd /tmp && go get -u github.com/vbatts/git-validation
+          cd /tmp && go install github.com/vbatts/git-validation@latest
 
     - name: Build
       working-directory: ./src/github.com/distribution/distribution