Update common CI files to latest version from networkservicemesh/cmd-…

…template@master networkservicemesh/cmd-template#35

networkservicemesh/cmd-template PR link: networkservicemesh/cmd-template#35

networkservicemesh/cmd-template commit message:
commit f5bdb3e08c8b945af09c23c52dc77c9fc9ad19ea
Author: Denis Tingaikin <49399980+denis-tingajkin@users.noreply.github.com>
Date:   Mon Nov 9 14:11:20 2020 +0700

    fix: set-env is deprecated (#35)

    Signed-off-by: Denis Tingajkin <denis.tingajkin@xored.com>

Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

.github/workflows/pr-for-updates.yaml

@@ -14,7 +14,7 @@ jobs:
         run: |
           PULL_REQUEST_BODY=$(git log -1)
           echo ${PULL_REQUEST_BODY}
-          echo "::set-env name=PULL_REQUEST_BODY::${PULL_REQUEST_BODY}"
+          echo PULL_REQUEST_BODY=${PULL_REQUEST_BODY} >> $GITHUB_ENV
       - name: pull-request-action
         uses: vsoch/pull-request-action@1.0.6
         env: