ADIOS2: Re-trigger registration (#12975)

Author: eschnett

A/ADIOS2/build_tarballs.jl

@@ -232,3 +232,5 @@ ENV["MPITRAMPOLINE_DELAY_INIT"] = "1"
 # We need MacOS SDK 11.0 for `std::filesystem`
 build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies;
                augment_platform_block, julia_compat="1.6", preferred_gcc_version=v"9")
+
+# Build trigger: 1