fix(ci): configure git identity before annotated Go SDK tag push

Annotated tags (git tag -a) embed committer info, which requires
user.email and user.name to be set. GitHub Actions runners have no
default identity, so the step failed with 'empty ident name not
allowed'. Lightweight tags don't hit this, but we switched to
annotated tags in e25061d for proper Go module metadata.

Use the standard github-actions[bot] identity so the tag is
attributable to the workflow.

Author: SoulKyu

.github/workflows/pulumi-release.yml

@@ -184,6 +184,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Configure git identity
+        # Annotated tags embed committer info. Use the standard
+        # github-actions[bot] identity so the tag is attributable to the
+        # workflow that created it.
+        run: |
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git config user.name "github-actions[bot]"
+
       - name: Push Go SDK tag
         run: |
           # Go SDK is versioned independently from the provider (major v0 for