chore(deps): update sigstore/cosign-installer digest to 1a22e17 (#663)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| sigstore/cosign-installer | action | digest | `dd6b2e2` -> `1a22e17` |

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.github/workflows/release-please.yaml

@@ -119,7 +119,7 @@ jobs:
             COMMIT=${{ github.sha }}
             DATE=${{ steps.date.outputs.date }}
       - name: Install Cosign
-        uses: sigstore/cosign-installer@dd6b2e2b610a11fd73dd187a43d57cc1394e35f9
+        uses: sigstore/cosign-installer@1a22e17968bb5f9192b82a39d3ffb322627f5169
 
       - name: Sign the image
         run: |