chore: exclude in-toto/attestation SA1019 deprecations from staticcheck

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

Author: crazy-max

.golangci.yml

@@ -124,6 +124,9 @@ linters:
       - linters:
           - revive
         text: var-naming
+      - linters:
+          - staticcheck
+        text: "SA1019: .* is deprecated: .*in-toto/attestation"
     paths:
       - .*\.pb\.go$
       - examples