Update MainDistributionPipeline.yml

Author: lmangani

.github/workflows/MainDistributionPipeline.yml

@@ -16,7 +16,7 @@ jobs:
     name: Build extension binaries
     uses: duckdb/extension-ci-tools/.github/workflows/_extension_distribution.yml@main
     with:
-      duckdb_version: main
+      duckdb_version: v1.2.0
       ci_tools_version: main
       extension_name: pyroscope
       extra_toolchains: rust;python3