CI: Disable RISE riscv runner (apt install failing)

Signed-off-by: Matthias J. Kannwischer <matthias@zerorisc.com>

Author: mkannwischer

.github/workflows/base.yml

@@ -34,9 +34,10 @@ jobs:
            name: 'aarch64'
          - runner: ubuntu-latest
            name: 'x86_64'
+         # TODO: RISE riscv runner currently fails during apt install — re-enable once fixed.
          # via https://riseproject-dev.github.io/riscv-runner/
-         - runner: ubuntu-24.04-riscv
-           name: 'riscv'
+         # - runner: ubuntu-24.04-riscv
+         #   name: 'riscv'
          - runner: macos-latest
            name: 'macos (aarch64)'
          - runner: macos-15-intel
@@ -71,9 +72,10 @@ jobs:
            name: 'aarch64'
          - runner: ubuntu-latest
            name: 'x86_64'
+         # TODO: RISE riscv runner currently fails during apt install — re-enable once fixed.
          # via https://riseproject-dev.github.io/riscv-runner/
-         - runner: ubuntu-24.04-riscv
-           name: 'riscv'
+         # - runner: ubuntu-24.04-riscv
+         #   name: 'riscv'
         acvp-version: [v1.1.0.39, v1.1.0.40, v1.1.0.41]
         exclude:
           - {external: true,