[llvm] [llvm][release] Describe types of release package on the release page (PR #138144)

[David Spickett via llvm-commits]

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@@ -42,18 +42,30 @@ def create_release(repo, release, tag=None, name=None, message=None):
         name = "LLVM {}".format(release)
 
     if not message:
+        # Note that these lines are not length limited because if we do so, GitHub
+        # assumes that should be how it is laid out on the page. We want GitHub to
+        # do the reflowing for us instead.
         message = dedent(
             """\
-            LLVM {} Release
+LLVM {release} Release
 
-            # A note on binaries
+# Package Types
 
-            Volunteers make binaries for the LLVM project, which will be uploaded
-            when they have had time to test and build these binaries. They might
-            not be available directly or not at all for each release. We suggest
-            you use the binaries from your distribution or build your own if you
-            rely on a specific platform or configuration."""
-        ).format(release)
+* If the file name starts with `LLVM-` then it is a binary release of LLVM for the platform at the end of the file name. For example, `LLVM-{release}-Linux-ARM64.tar.xz` contains LLVM binaries for Arm64 Linux.
+* If the file name starts with `clang+llvm-` then it is a binary release of LLVM for the platform at the end of the filename. For example, `clang+llvm-{release}-armv7a-linux-gnueabihf.tar.gz` contains LLVM binaries for Armv7-a Linux.
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DavidSpickett wrote:

Yes, I've reworded it.

https://github.com/llvm/llvm-project/pull/138144