Bump toolchains/riscv-tools/riscv-pk from 1a52fa4 to abadfdc

Bumps [toolchains/riscv-tools/riscv-pk](https://github.com/riscv-software-src/riscv-pk) from `1a52fa4` to `abadfdc`.
- [Commits](riscv-software-src/riscv-pk@1a52fa4...abadfdc)

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

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