Update lightingest.md

format fix

Author: v-albemi

articles/data-explorer/lightingest.md

@@ -83,7 +83,7 @@ The `-creationTimePattern` argument extracts the CreationTime property from the
 The argument values must include:
 * Constant test immediately preceding the timestamp, enclosed in single quotes
 * The timestamp format, in standard [.NET DateTime notation](https://docs.microsoft.com/dotnet/standard/base-types/custom-date-and-time-format-strings)
-* Constant text immediately following the timestamp. For example, if blob names end with 'historicalvalues19840101.parquet' (the timestamp is four digits for the year, two digits for the month, and two digits for the day of month), the corresponding value for the `-creationTimePattern` argument is:
+* Constant text immediately following the timestamp. For example, if blob names end with `historicalvalues19840101.parquet` (the timestamp is four digits for the year, two digits for the month, and two digits for the day of month), the corresponding value for the `-creationTimePattern` argument is:
 
 ```
 ingest-{Cluster name and region}.kusto.windows.net;AAD Federated Security=True -db:{Database} -table:Trips -source:"https://{Account}.blob.core.windows.net/{ROOT_CONTAINER};{StorageAccountKey}" -creationTimePattern:"'historicalvalues'yyyyMMdd'.parquet'"