👔 Disable sccache on linux-riscv64 maturin build

Not supported yet because sccache=0.14.0 on PyPI doesn't have riscv64 wheels.

Author: weiji14

.github/workflows/ci.yml

@@ -86,7 +86,7 @@ jobs:
         with:
           target: ${{ matrix.platform.target }}
           args: --release --locked --compatibility pypi --features ${{ matrix.platform.feat-flags || 'pyo3' }} --out dist --interpreter python3.13
-          sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
+          sccache: ${{ !startsWith(github.ref, 'refs/tags/') && matrix.platform.target != 'riscv64' }}
           manylinux: ${{ matrix.platform.manylinux || '2_28' }}
           before-script-linux: |
             # Install nvTIFF and clang-devel
@@ -110,7 +110,7 @@ jobs:
         with:
           target: ${{ matrix.platform.target }}
           args: --release --locked --compatibility pypi --features ${{ matrix.platform.feat-flags || 'pyo3' }} --out dist --interpreter python3.13t
-          sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
+          sccache: ${{ !startsWith(github.ref, 'refs/tags/') && matrix.platform.target != 'riscv64' }}
           manylinux: ${{ matrix.platform.manylinux || '2_28' }}
           before-script-linux: |
             # Install nvTIFF and clang-devel