chore(deps): bump actions/cache/save from 5.0.5 to 6.1.0 (#4647)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -48,7 +48,7 @@ jobs:
         run: nix develop --impure .#ci -c go mod download
 
       - name: Save go caches - go mod
-        uses: actions/cache/save@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: .devenv/state/go
           key: ${{ runner.os }}-openmeter-go-modules-${{ github.ref_name }}-${{ hashFiles('flake.*', 'go.*', '.github/workflows/*.yaml') }}