Bump toolchains/riscv-tools/riscv-openocd from ca80920 to eb9ba21

Bumps [toolchains/riscv-tools/riscv-openocd](https://github.com/riscv/riscv-openocd) from `ca80920` to `eb9ba21`.
- [Release notes](https://github.com/riscv/riscv-openocd/releases)
- [Commits](riscv-collab/riscv-openocd@ca80920...eb9ba21)

---
updated-dependencies:
- dependency-name: toolchains/riscv-tools/riscv-openocd
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]