Update sigstore

Gemfile

@@ -14,7 +14,7 @@ group :development do
   gem "rubocop-performance", "~> 1"
   gem "rubocop-rspec", "~> 3"
   gem "rubygems-await", "~> 0.5.4"
-  gem "sigstore-cli", git: "https://github.com/sigstore/sigstore-ruby", ref: "ce93acf7fa7e26ba81ff21820848d7df2273a557"
+  gem "sigstore-cli", "~> 0.2.1"
   gem "simplecov", "~> 0.22"
   gem "simplecov-erb", "~> 1"
   gem "vcr", "~> 6.3", ">= 6.3.1"

Gemfile.lock

@@ -1,12 +1,3 @@
-GIT
-  remote: https://github.com/sigstore/sigstore-ruby
-  revision: ce93acf7fa7e26ba81ff21820848d7df2273a557
-  ref: ce93acf7fa7e26ba81ff21820848d7df2273a557
-  specs:
-    sigstore-cli (0.2.1)
-      sigstore (= 0.2.1)
-      thor
-
 PATH
   remote: .
   specs:
@@ -198,6 +189,9 @@ GEM
       net-http
       protobug_sigstore_protos (~> 0.1.0)
       uri
+    sigstore-cli (0.2.1)
+      sigstore (= 0.2.1)
+      thor
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -238,7 +232,7 @@ DEPENDENCIES
   rubocop-performance (~> 1)
   rubocop-rspec (~> 3)
   rubygems-await (~> 0.5.4)
-  sigstore-cli!
+  sigstore-cli (~> 0.2.1)
   simplecov (~> 0.22)
   simplecov-erb (~> 1)
   vcr (~> 6.3, >= 6.3.1)