[llvm][release] Correct formatting field in release message

Extra } needed removing.

Author: DavidSpickett

llvm/utils/release/github-upload-release.py

@@ -58,7 +58,7 @@ def create_release(repo, release, tag=None, name=None, message=None):
 * [Linux x86_64](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/LLVM-{release}-Linux-X64.tar.xz) ([signature](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/LLVM-{release}-Linux-X64.tar.xz.jsonl))
 * [Linux Arm64](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/LLVM-{release}-Linux-ARM64.tar.xz) ([signature](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/LLVM-{release}-Linux-ARM64.tar.xz.jsonl))
 AUTOMATIC_DOWNLOAD_LINKS_END -->
-<!-- * [Linux Armv7-a](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/clang+llvm-{release}-armv7a-linux-gnueabihf.tar.gz) ([signature](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}}/clang+llvm-{release}-armv7a-linux-gnueabihf.tar.gz.sig)) -->
+<!-- * [Linux Armv7-a](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/clang+llvm-{release}-armv7a-linux-gnueabihf.tar.gz) ([signature](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/clang+llvm-{release}-armv7a-linux-gnueabihf.tar.gz.sig)) -->
 
 <!-- AUTOMATIC_DOWNLOAD_LINKS_BEGIN
 * [macOS Apple Silicon](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/LLVM-{release}-macOS-ARM64.tar.xz) (ARM64) ([signature](https://github.com/llvm/llvm-project/releases/download/llvmorg-{release}/LLVM-{release}-macOS-ARM64.tar.xz.jsonl))