Fix GitHub Actions output parsing in sync workflow (#78)

The sync script output may contain \r\n line endings, causing values
like `classification=build-changes\r` to be written to `$GITHUB_OUTPUT`.
GitHub Actions rejects this as `Invalid format 'build-changes'`.

Fix: add `tr -d '\r'` when parsing Branch, Classification, and PR fields
from script output.

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: agocke

.github/workflows/sync-release.yml

@@ -56,9 +56,9 @@ jobs:
           echo "$output"
 
           # Parse outputs from the script's summary
-          sync_branch=$(echo "$output" | grep '^ *Branch:' | awk '{print $2}')
-          classification=$(echo "$output" | grep '^ *Classification:' | awk '{print $2}')
-          pr_url=$(echo "$output" | grep '^ *PR:' | awk '{print $2}')
+          sync_branch=$(echo "$output" | grep '^ *Branch:' | awk '{print $2}' | tr -d '\r')
+          classification=$(echo "$output" | grep '^ *Classification:' | awk '{print $2}' | tr -d '\r')
+          pr_url=$(echo "$output" | grep '^ *PR:' | awk '{print $2}' | tr -d '\r')
           pr_number=$(echo "$pr_url" | grep -oP '/pull/\K[0-9]+' || true)
 
           if [[ -n "$sync_branch" ]]; then