Remove 'v' prefix from release tag and version

Tags and releases now use bare version numbers (e.g. 1.0.4) instead of
v-prefixed (v1.0.4). The changelog lookup still uses 'v' prefix since
CHANGELOG.md headers are formatted as '## v1.0.4'.

.... Generated with [Cortex Code](https://docs.snowflake.com/en/user-guide/cortex-code/cortex-code)

Co-Authored-By: Cortex Code <noreply@snowflake.com>

Author: jonhopper-dataengineers

.github/workflows/release.yml

@@ -32,12 +32,12 @@ jobs:
       - name: Check if tag already exists
         id: check_tag
         run: |
-          if git rev-parse --verify "refs/tags/v${{ steps.version.outputs.version }}" >/dev/null 2>&1; then
+          if git rev-parse --verify "refs/tags/${{ steps.version.outputs.version }}" >/dev/null 2>&1; then
             echo "exists=true" >> "$GITHUB_OUTPUT"
-            echo "Tag v${{ steps.version.outputs.version }} already exists — skipping release."
+            echo "Tag ${{ steps.version.outputs.version }} already exists — skipping release."
           else
             echo "exists=false" >> "$GITHUB_OUTPUT"
-            echo "Tag v${{ steps.version.outputs.version }} does not exist — will create release."
+            echo "Tag ${{ steps.version.outputs.version }} does not exist — will create release."
           fi
 
       - name: Extract changelog for this version
@@ -85,7 +85,7 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
-          gh release create "v${{ steps.version.outputs.version }}" \
+          gh release create "${{ steps.version.outputs.version }}" \
             --title "${{ steps.changelog.outputs.title }}" \
             --notes-file /tmp/release_notes.md \
             --target "${{ github.sha }}"