release: add binaries for riscv64gc-unknown-linux-gnu target

Note that we skip lz4/brotli/zstd tests on RISC-V.

The CI runs RISC-V tests using cross/QEMU emulation. The decompression
tools (lz4, brotli, zstd) are x86_64 binaries on the host that cannot
execute in the RISC-V QEMU environment.

Skip these three tests at compile-time on RISC-V to avoid test failures.
The -z/--search-zip functionality itself works correctly on real RISC-V
hardware where native decompression tools are available.

PR #3165

CHANGELOG.md

@@ -67,6 +67,8 @@ Feature enhancements:
   Improve completions for `--hyperlink-format` in bash and fish.
 * [FEATURE #3102](https://github.com/BurntSushi/ripgrep/pull/3102):
   Improve completions for `--hyperlink-format` in zsh.
+* [FEATURE #3165](https://github.com/BurntSushi/ripgrep/pull/3165):
+  Add release binaries for `riscv64gc-unknown-linux-gnu`.
 
 
 14.1.1 (2024-09-08)