release: update GoReleaser to 1.20.0

Which now allows us to set the `mod_timestamp` on universal binaries.

Signed-off-by: Hidde Beydals <hidde@hhh.computer>

.github/workflows/release.yml

@@ -64,7 +64,7 @@ jobs:
         id: goreleaser
         uses: goreleaser/goreleaser-action@336e29918d653399e599bfca99fadc1d7ffbc9f7 # v4.3.0
         with:
-          version: 1.19.x
+          version: 1.20.x
           args: release --clean --timeout 1h
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yaml

@@ -82,8 +82,8 @@ universal_binaries:
     # darwin/arm64.
     replace: false
     # Modified timestamp on the binary, set to ensure reproducible builds.
-    # NB: Available in (unreleased) GoReleaser >=1.20.0.
-    # mod_timestamp: "{{ .CommitTimestamp }}"
+    # NB: Available in GoReleaser >=1.20.0.
+    mod_timestamp: "{{ .CommitTimestamp }}"
 
 # xref: https://goreleaser.com/customization/nfpm/
 nfpms: