Install Carthage via Homebrew before running carthage.sh in publish workflow

Agent-Logs-Url: https://github.com/mixpanel/mixpanel-swift/sessions/eec3ba6e-8bc8-481d-bbca-a1116860f9e7

Co-authored-by: ketanmixpanel <188901560+ketanmixpanel@users.noreply.github.com>

.github/workflows/publish.yml

@@ -146,6 +146,10 @@ jobs:
           git tag -a "${{ inputs.version }}" -m "Release ${{ inputs.version }}"
           git push origin "${{ inputs.version }}"
 
+      - name: Install Carthage
+        if: ${{ !inputs.dry_run }}
+        run: brew install carthage
+
       - name: Build Carthage XCFramework
         if: ${{ !inputs.dry_run }}
         run: |