build(deps): bump actions/upload-artifact from 5.0.0 to 6.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](330a01c490...b7c566a772)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/release-tag.yml

@@ -113,7 +113,7 @@ jobs:
           nix develop -c minisign -S -m "ghostty-source.tar.gz" -s minisign.key < minisign.password
 
       - name: Upload artifact
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: source-tarball
           path: |-
@@ -269,7 +269,7 @@ jobs:
           zip -9 -r --symlinks ../../../ghostty-macos-universal-dsym.zip Ghostty.app.dSYM/
 
       - name: Upload artifact
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: macos
           path: |-
@@ -340,7 +340,7 @@ jobs:
           mv appcast_new.xml appcast.xml
 
       - name: Upload artifact
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: sparkle
           path: |-

.github/workflows/test.yml

@@ -397,7 +397,7 @@ jobs:
 
       - name: Upload artifact
         id: upload-artifact
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: source-tarball
           path: |-