update agoric sdk version

Author: minniux

.github/workflows/agoric.yaml

@@ -53,7 +53,7 @@ jobs:
       - name: Extract SDK version
         run: |
           cd agoric-sdk
-          echo "SDK_VERSION=57" >> $GITHUB_ENV
+          echo "SDK_VERSION=61" >> $GITHUB_ENV
           cd ..
 
       - name: Manually pull the base Docker image
@@ -63,9 +63,9 @@ jobs:
 
       - name: Build and push agoric Docker image
         run: |
-          ./heighliner build -c agoric-imported --git-ref ${{ env.SDK_VERSION }}
+          ./heighliner build -c agoric-imported --git-ref ${{ env.VERSION }}
 
       - name: Tag and push Docker image
         run: |
-          docker tag agoric-imported:${{ env.SDK_VERSION }} ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.VERSION }}
+          docker tag agoric-imported:${{ env.VERSION }} ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.VERSION }}
           docker push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.VERSION }}