Bump AbiTagPostBuildChecks number

Because this is changing the output packages, it needs to change the output
package ABI (so we'll regenerate all packages with the new SBOM information)

Author: ekilmer

src/vcpkg/commands.build.cpp

@@ -1470,7 +1470,7 @@ namespace vcpkg
 #endif
 
         abi_tag_entries.emplace_back(AbiTagPortsDotCMake, paths.get_ports_cmake_hash().to_string());
-        abi_tag_entries.emplace_back(AbiTagPostBuildChecks, "2");
+        abi_tag_entries.emplace_back(AbiTagPostBuildChecks, "3");
         InternalFeatureSet sorted_feature_list = action.feature_list;
         // Check that no "default" feature is present. Default features must be resolved before attempting to calculate
         // a package ABI, so the "default" should not have made it here.