fix: Added condition to check changeLog.md file exist or not

scripts/updateApiDefinitions.sh

@@ -3,15 +3,19 @@ echo "Copying api-definitions"
 cp -R ~/oai_definitions/json/. src/services/twilio-api/
 echo "Running update changelog script"
 node scripts/update-api-definitions.js
-changeLog=$(cat changeLog.md)
-rm -rf changeLog.md
-if [ "$changeLog" != '' ]; then
-  changeLog="${changeLog//'%'/'%25'}"
-  changeLog="${changeLog//$'\n'/'%0A'}"
-  changeLog="${changeLog//$'\r'/'%0D'}"
+changeLog=''
+versionType=-1
+if [ -f changeLog.md ]; then 
+  changeLog=$(cat changeLog.md)
+  rm -rf changeLog.md
+  if [ "$changeLog" != '' ]; then
+    changeLog="${changeLog//'%'/'%25'}"
+    changeLog="${changeLog//$'\n'/'%0A'}"
+    changeLog="${changeLog//$'\r'/'%0D'}"
+    versionType=$(node scripts/get-version-type.js | tail -n -1)
+  fi
 fi
 echo "Changelog: $changeLog"
-versionType=$(node scripts/get-version-type.js | tail -n -1)
 echo "Version type: $versionType"
 rm -rf OAI_CHANGES.md
 echo "Git configurations"