build: update release workflow for sha256 command (#371)

Signed-off-by: Ben Stickel <[email protected]>

Author: fin09pcap

.github/workflows/releaser.yml

@@ -146,7 +146,7 @@ jobs:
           #!/bin/bash
           shopt -s expand_aliases
           cd .dist
-          sha256sum *.tar.gz > checksums.txt
+          sha256 *.tar.gz > checksums.txt
           FILES="*"
           for f in $FILES;
           do
@@ -155,7 +155,7 @@ jobs:
                 cosign sign-blob --key <(echo -n "${COSIGN_KEY}") "$f" > "$f.sig"
                 ;;
             *.tar.gz)
-                sha256sum "$f" | cut -d " " -f 1 > "$f.sha256"
+                sha256 "$f" | cut -d " " -f 4 > "$f.sha256"
                 cosign sign-blob --key <(echo -n "${COSIGN_KEY}") "$f" > "$f.sig"
                 ;;
             esac