Use stable toolchain for fuzzing

Author: RCasatta

.github/workflows/fuzz.yml

@@ -26,14 +26,14 @@ jobs:
           key: cache-${{ matrix.target }}-${{ hashFiles('**/Cargo.toml','**/Cargo.lock') }}
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: stable
           override: true
           profile: minimal
       - run: cargo install honggfuzz
         if: steps.cache-fuzz.outputs.cache-hit != 'true'
       - run: echo "HFUZZ_RUN_ARGS=\"--run_time 30 --exit_upon_crash -v -f hfuzz_input/${{ matrix.fuzz_target }}/input\"" >> $GITHUB_ENV
       - name: fuzz
-        run: cd fuzz && cargo +nightly hfuzz run ${{ matrix.fuzz_target }}
+        run: cd fuzz && cargo hfuzz run ${{ matrix.fuzz_target }}
       - run: echo "${{ matrix.fuzz_target }}.rs" >executed_${{ matrix.fuzz_target }}
       - uses: actions/upload-artifact@v2
         with: