Update README.md now that platform_mappings are obsolete in Bazel7

README.md

@@ -26,9 +26,7 @@ You can now use libraries in `deps` through the `@boost` repository, for example
 
 ## If you're using the Apple or Android-specific rules...
 
-As with all platform-dependent C/C++ in Bazel, you'll need to set up [`platform_mappings`](https://bazel.build/concepts/platforms#platform-mappings) until Bazel resolves its outstanding issues.
-
-It's not hard if you know what to to do, but can be tricky to figure out. If you'd like help with this, please let us know over at https://github.com/hedronvision/bazel-make-cc-https-easy/issues/4
+As with all platform-dependent C/C++ in Bazel, you'll need to use Bazel 7+ (and a similarly recent version of rules_apple) for per-platform configuration to work automatically out of the box. (Please file a PR to delete this section if Bazel 7 is now so old as to be standard.)
 
 ## Suggestion: Updates