ci: add splunk update semver (#278)

Use internal update-semver action

JIRA: https://splunk.atlassian.net/browse/ADDON-68596

Author: mbruzda-splunk

.github/workflows/build-test-release.yaml

@@ -58,9 +58,14 @@ jobs:
   update-semver:
     if: startsWith(github.ref, 'refs/tags/v')
     needs: publish
-    permissions:
-      contents: write
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: haya14busa/action-update-semver@v1
+      - uses: splunk/addonfactory-update-semver@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN_ADMIN }}
+        with:
+          git_committer_name: ${{ secrets.SA_GH_USER_NAME }}
+          git_committer_email: ${{ secrets.SA_GH_USER_EMAIL }}
+          gpg_private_key: ${{ secrets.SA_GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.SA_GPG_PASSPHRASE }}