fix: Update rules_foreign_cc to 0.15.1 for full Bazel 7.x compatibility

- Update rules_foreign_cc from 0.13.0 to 0.15.1
- Version 0.15.1 is the latest stable release tested with Bazel 7.x
- Includes all required toolchains (meson, pkgconfig, etc.)
- Fixes 'no such target built_pkgconfig_toolchain' error

Author: Petr Matousek

MODULE.bazel

@@ -9,7 +9,7 @@ bazel_dep(name = "bazel_skylib", version = "1.8.2")
 
 # https://github.com/bazelbuild/rules_foreign_cc
 # https://github.com/bazelbuild/rules_foreign_cc/issues/1035
-bazel_dep(name = "rules_foreign_cc", version = "0.13.0")
+bazel_dep(name = "rules_foreign_cc", version = "0.15.1")
 
 # https://github.com/bazelbuild/bazel/issues/17289#issuecomment-1438406403
 bazel_dep(name="platforms", version="1.0.0")