ci: unpin CFLite

The idea was to catch CFLite regressions but since the action itself
pulls the latest docker images it can't be pinned properly and issues
like https://github.com/google/clusterfuzzlite/issues/91 are going to
pop up anyway. Let's unpin it by analogy with CIFuzz and hope it doesn't
break very often.

.github/workflows/cflite_pr.yml

@@ -25,13 +25,13 @@ jobs:
     steps:
     - name: Build Fuzzers (${{ matrix.sanitizer }})
       id: build
-      uses: google/clusterfuzzlite/actions/build_fuzzers@41dccd0566905e2a7d1724e7883edbfa66d78877
+      uses: google/clusterfuzzlite/actions/build_fuzzers@v1
       with:
         sanitizer: ${{ matrix.sanitizer }}
         github-token: ${{ secrets.GITHUB_TOKEN }}
     - name: Run Fuzzers (${{ matrix.sanitizer }})
       id: run
-      uses: google/clusterfuzzlite/actions/run_fuzzers@41dccd0566905e2a7d1724e7883edbfa66d78877
+      uses: google/clusterfuzzlite/actions/run_fuzzers@v1
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         fuzz-seconds: 1200