Migrate to jq

Signed-off-by: maksim.nabokikh <max.nabokih@gmail.com>

Author: nabokihms

.github/workflows/publish-tag.yaml

@@ -46,7 +46,7 @@ jobs:
         if: ${{ github.event_name == 'pull_request' }}
         run: |
           source "$(werf ci-env github --as-file)"
-          source <(jq -r '.labels | to_entries | to_entries[] | "WERF_EXPORT_ADD_LABEL_\(.key)=\(.value.key)=\(.value.value)"' <<< $DOCKER_METADATA_OUTPUT_JSON)
+          . "$(jq -r '.labels | to_entries | to_entries[] | "WERF_EXPORT_ADD_LABEL_\(.key)=\(.value.key)=\(.value.value)"' <<< $DOCKER_METADATA_OUTPUT_JSON)"
           werf build
 
         # with: