ci: remove update action with dispatch event

Author: wibus-wee

.github/workflows/build.yml

@@ -72,7 +72,7 @@ jobs:
       # Sparkle Appcast
       ############################
       - name: Update Sparkle appcast
-        if: github.event_name == 'release' || github.event_name == 'workflow_dispatch'
+        if: github.event_name == 'release'
         env:
           # SPARKLE_KEY: Sparkle EdDSA key exported from `generate_keys -x` as plain text
           # SPARKLE_CHANNEL: Seperate dev builds from default channel, to be specified in [SPUUpdaterDelegate allowedChannelsForUpdater:]
@@ -107,7 +107,7 @@ jobs:
           files: "${{ RUNNER.TEMP }}/Sparkle_Archive/appcast.xml"
 
       - name: Upload Sparkle Artifact
-        if: github.event_name == 'release' || github.event_name == 'workflow_dispatch'
+        if: github.event_name == 'release'
         uses: actions/upload-artifact@v4
         with:
           name: appcast.xml