Fix publish action

Author: alex268

.github/workflows/publish.yaml

@@ -20,7 +20,7 @@ jobs:
         run: |
           JDBC_VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
           SDK_VERSION=$(mvn help:evaluate -Dexpression=ydb.sdk.version -q -DforceStdout)
-          echo "JDBC_VERSION=JDBC_VERSION" >> "$GITHUB_ENV"
+          echo "JDBC_VERSION=$JDBC_VERSION" >> "$GITHUB_ENV"
           echo "SDK_VERSION=$SDK_VERSION" >> "$GITHUB_ENV"
 
       - name: Fail workflow if version is snapsot