Update GitHub API to use current REST API version

Co-authored-by: diberry <[email protected]>

Author: Copilot

.github/workflows/validate-workflows.yml

@@ -118,7 +118,8 @@ jobs:
             API_URL="https://api.github.com/repos/$ACTION_PATH"
             RESPONSE=$(curl -s -w "\n%{http_code}" \
               -H "Authorization: token $GITHUB_TOKEN" \
-              -H "Accept: application/vnd.github.v3+json" \
+              -H "Accept: application/vnd.github+json" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
               "$API_URL")
             
             HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
@@ -129,7 +130,8 @@ jobs:
               # Try to fetch latest release for comparison
               RELEASE_RESPONSE=$(curl -s \
                 -H "Authorization: token $GITHUB_TOKEN" \
-                -H "Accept: application/vnd.github.v3+json" \
+                -H "Accept: application/vnd.github+json" \
+                -H "X-GitHub-Api-Version: 2022-11-28" \
                 "$API_URL/releases/latest")
               
               LATEST_RELEASE=$(echo "$RELEASE_RESPONSE" | jq -r '.tag_name // empty')