Try to fix riscv

Author: hkctkuy

.github/workflows/riscv64.yml

@@ -25,7 +25,10 @@ jobs:
         install: |
           export CARGO_TERM_COLOR=always
           export CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
-          apt-get update && apt-get install -y gdb pip curl python3.10-dev clang llvm build-essential
+          apt-get install software-properties-common \
+            && add-apt-repository ppa:deadsnakes/ppa \
+            && apt-get update \
+            && apt-get install -y gdb pip curl python3.10-dev clang llvm build-essential
           curl https://sh.rustup.rs -o rustup.sh && chmod +x rustup.sh && \
           ./rustup.sh -y && rm rustup.sh
         run: |