fix: double slash in ecosystem_ci_dispatch comment URL

Amp-Thread-ID: https://ampcode.com/threads/T-019d4274-65ac-7249-90ad-2a159a60c9de
Co-authored-by: Amp <amp@ampcode.com>

Author: fi3ework

.github/actions/ecosystem_ci_dispatch/action.yaml

@@ -102,7 +102,7 @@ runs:
       with:
         result-encoding: string
         script: |
-          const url = `${context.serverUrl}//${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`
+          const url = `${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`
           const urlLink = `[Open](${url})`
           const prData = ${{ steps.get-pr-number.outputs.result }}