macos: update to Sparkle 2.9 (#11034)

Nothing critical, though we may make use of some of the new features
like Markdown and signed feeds in a follow up PR.

.github/workflows/release-tag.yml

@@ -160,7 +160,7 @@ jobs:
 
       - name: Setup Sparkle
         env:
-          SPARKLE_VERSION: 2.7.3
+          SPARKLE_VERSION: 2.9.0
         run: |
           mkdir -p .action/sparkle
           cd .action/sparkle
@@ -328,7 +328,7 @@ jobs:
 
       - name: Setup Sparkle
         env:
-          SPARKLE_VERSION: 2.7.3
+          SPARKLE_VERSION: 2.9.0
         run: |
           mkdir -p .action/sparkle
           cd .action/sparkle

.github/workflows/release-tip.yml

@@ -259,7 +259,7 @@ jobs:
       # Setup Sparkle
       - name: Setup Sparkle
         env:
-          SPARKLE_VERSION: 2.7.3
+          SPARKLE_VERSION: 2.9.0
         run: |
           mkdir -p .action/sparkle
           cd .action/sparkle
@@ -515,7 +515,7 @@ jobs:
       # Setup Sparkle
       - name: Setup Sparkle
         env:
-          SPARKLE_VERSION: 2.7.3
+          SPARKLE_VERSION: 2.9.0
         run: |
           mkdir -p .action/sparkle
           cd .action/sparkle
@@ -712,7 +712,7 @@ jobs:
       # Setup Sparkle
       - name: Setup Sparkle
         env:
-          SPARKLE_VERSION: 2.7.3
+          SPARKLE_VERSION: 2.9.0
         run: |
           mkdir -p .action/sparkle
           cd .action/sparkle

macos/Ghostty.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -6,8 +6,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/sparkle-project/Sparkle",
       "state" : {
-        "revision" : "9a1d2a19d3595fcf8d9c447173f9a1687b3dcadb",
-        "version" : "2.8.0"
+        "revision" : "21d8df80440b1ca3b65fa82e40782f1e5a9e6ba2",
+        "version" : "2.9.0"
       }
     }
   ],