update changelog with timeseries gridshow

Author: anson

CHANGELOG.rst

@@ -14,7 +14,7 @@ x.x.x ?
 * Fix mappings for Table
 * Added support for AWS Cross-Account in CloudwatchMetricsTarget
 * Added `LokiTarget`
-
+* Added `axisGridShow` parameter to `TimeSeries`
 0.7.1 2024-01-12
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