Remove whitespace from build.yaml

Author: ruimarinho

.github/workflows/build.yaml

@@ -97,14 +97,14 @@ jobs:
           echo ::set-output name=tags::${TAGS[@]}
           echo ::set-output name=build::true
 
-      - if:  ${{ steps.prepare.outputs.build }} == 'true'
+      - if: ${{ steps.prepare.outputs.build }} == 'true'
         name: Login into Docker Hub
         uses: docker/login-action@v1
         with:
           username: ruimarinho
           password: ${{ secrets.DOCKER_HUB_PASSWORD }}
 
-      - if:  ${{ steps.prepare.outputs.build }} == 'true'
+      - if: ${{ steps.prepare.outputs.build }} == 'true'
         name: Build Docker image
         run: |
           TAGS=(${{ steps.prepare.outputs.tags }})