Fix MainDistributionPipeline at v1.2.1

Author: daniellietz

.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: v1.2.1
       ci_tools_version: main
       extension_name: postgres_scanner
       exclude_archs: 'wasm_mvp;wasm_eh;wasm_threads;windows_amd64_mingw'
@@ -27,7 +27,7 @@ jobs:
     uses: duckdb/extension-ci-tools/.github/workflows/_extension_deploy.yml@main
     secrets: inherit
     with:
-      duckdb_version: main
+      duckdb_version: v1.2.1
       ci_tools_version: main
       extension_name: postgres_scanner
       exclude_archs: 'wasm_mvp;wasm_eh;wasm_threads;windows_amd64_mingw'