ci: fix errors due GitHub host changes

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

Author: otavio

.github/workflows/code_style.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: nightly-2023-03-24
           override: true
           components: rustfmt, clippy
 

.github/workflows/linux.yml

@@ -136,5 +136,5 @@ jobs:
 
       - name: Clear the cargo caches
         run: |
-          cargo install cargo-cache --no-default-features --features ci-autoclean
+          cargo +stable install cargo-cache --no-default-features --features ci-autoclean
           cargo-cache