Fix build with SIP >= 6.8.0

--- cmake/modules/pyproject.toml.in.orig	2023-12-08 23:06:29 UTC
+++ cmake/modules/pyproject.toml.in
@@ -9,7 +9,7 @@ sip-files-dir = "@module_srcs@"
 sip-module = "@sip_name@"
 sip-include-dirs = @sip_include_dirs@
 sip-files-dir = "@module_srcs@"
-abi-version = "12"
+abi-version = "12.13"
 
 [tool.sip.bindings.@module_name_toml@]
 tags = @module_tags@
