Update Swatinem/rust-cache digest to 779680d

Author: renovate[bot]

.github/actions/setup-ci/action.yaml

@@ -13,7 +13,7 @@ runs:
       shell: bash
       run: rustup show
 
-    - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2
+    - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2
       with:
         key: "${{ inputs.rust-cache-key }}"
         shared-key: "${{ inputs.rust-cache-shared-key }}"