Fixed one more place where generic cache was used

Author: frozenspider

.github/workflows/coverage-pr.yml

@@ -30,8 +30,8 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: ${{ runner.os }}-cargo-
+          key: ${{ runner.os }}-cargo-llvm-cov-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-llvm-cov
 
       - run: which cargo-llvm-cov || cargo install cargo-llvm-cov
       - run: rustup component add llvm-tools-preview