workflows: ci: add riscv64 musllinux build

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>

Author: threexc

.github/workflows/ci.yaml

@@ -152,6 +152,16 @@ jobs:
           - { spec: cp314-manylinux_riscv64, arch: riscv64, omit: ${{ env.skip_slow_jobs }} }
           - { spec: cp314t-manylinux_riscv64, arch: riscv64, omit: ${{ env.skip_slow_jobs }} }
 
+          # riscv64 musllinux
+          - { spec: cp310-musllinux_riscv64, arch: riscv64, omit: ${{ env.skip_ci_redundant_jobs }} }
+          - { spec: cp311-musllinux_riscv64, arch: riscv64, omit: ${{ env.skip_ci_redundant_jobs }} }
+          - { spec: cp312-musllinux_riscv64, arch: riscv64, omit: ${{ env.skip_ci_redundant_jobs }} }
+          - { spec: cp313-musllinux_riscv64, arch: riscv64, omit: ${{ env.skip_ci_redundant_jobs }} }
+          - { spec: cp314-musllinux_riscv64, arch: riscv64, omit: ${{ env.skip_ci_redundant_jobs }} }
+          - { spec: cp314t-musllinux_riscv64, arch: riscv64, omit: ${{ env.skip_ci_redundant_jobs }} }
+          - { spec: cp315-musllinux_riscv64, arch: riscv64 }
+          - { spec: cp315t-musllinux_riscv64, arch: riscv64 }
+
   linux:
     needs: [python_sdist, make_linux_matrix]
     runs-on: ${{ (matrix.arch == 'aarch64') && 'ubuntu-24.04-arm' || 'ubuntu-24.04' }}