Update Swatinem/rust-cache digest to 779680d (#880)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/benchmark.template.yaml

@@ -54,7 +54,7 @@ jobs:
           toolchain: stable
           override: true
 
-      - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2
+      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
 
       - name: run subgraphs
         run: |