Update CHANGELOG about v0.13.2 release. (#1188)
Update CHANGELOG about v0.13.2 release. (#1188)


songy23/instrumentation-java,sebright/opencensus-java,bogdandrutu/opencensus-java,census-instrumentation/opencensus-java,songy23/instrumentation-java,bogdandrutu/opencensus-java,sebright/opencensus-java,songy23/instrumentation-java,sebright/opencensus-java,bogdandrutu/opencensus-java,census-instrumentation/opencensus-java,census-instrumentation/opencensus-java,sebright/instrumentation-java,sebright/instrumentation-java,bogdandrutu/instrumentation-java,bogdandrutu/instrumentation-java