Update CODEOWNERS (Azure#17605)

The TimeSeriesInsights label was incorrect. Fixing it.

Also ensure that we label PRs in the Synapse folder as well.

Author: AlexGhiondea

.github/CODEOWNERS

@@ -262,7 +262,7 @@
 /sdk/digitaltwins/                              @drwill-ms @timtay-microsoft @abhipsaMisra @vinagesh @azabbasi @bikamani @barustum @jamdavi
 
 # PRLabel: %TimeSeriesInsights
-# ServiceLabel: %Time Series Insights %Service Attention
+# ServiceLabel: %TimeSeriesInsights %Service Attention
 /sdk/timeseriesinsights/                        @drwill-ms @timtay-microsoft @abhipsaMisra @vinagesh @azabbasi @bikamani @barustum @jamdavi @yeskarthik @rasidhan @dmdenmsft
 
 # ServiceLabel: %Event Grid %Service Attention
@@ -562,6 +562,7 @@ sdk/trafficmanager/Microsoft.Azure.Management.TrafficManager/            @tmsupp
 /sdk/support/Microsoft.Azure.Management.Support/           @shahbj79 @mit2nil @aygoya @ganganarayanan
 
 # ServiceLabel: %Synapse %Service Attention
+# PRLabel: %Synapse
 /sdk/synapse/            @aim-for-better @idear1203 @chamons
 
 # PRLabel: %Tables