ci: update pr workflow

Author: voorepreethi

.github/workflows/pull_request.yaml

@@ -19,8 +19,8 @@ jobs:
 
       - name: Validate SAM Templates
         run: |
-          for template in $(find . -name "*.yaml" -o -name "*.yml" -not -path "./.github/*"); do
-            echo "Validating template: $template"
-            sam validate --template-file "$template" --region us-east-2 --lint
-          done      
+          find . -path "./.github" -prune -o \( -name "*.yaml" -o -name "*.yml" \) -print0 | while IFS= read -r -d '' template; do
+           echo "Validating template: $template"
+           sam validate --template-file "$template" --region us-east-2 --lint
+          done        
         shell: bash