fix: invalidate old cache by changing prefix-key

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: unhappychoice

.github/workflows/ci.yml

@@ -21,6 +21,8 @@ jobs:
         with:
           components: rustfmt
       - uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: v1-rust
       - run: cargo fmt --all -- --check
 
   clippy:
@@ -32,6 +34,8 @@ jobs:
         with:
           components: clippy
       - uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: v1-rust
       - run: cargo clippy --all-targets --all-features -- -D warnings
 
   test:
@@ -41,6 +45,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: v1-rust
       - run: cargo test
 
   build:
@@ -53,6 +59,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: v1-rust
       - run: cargo build --release
 
   nix-build: