Add pganssle to CODEOWNERS for zoneinfo (#139032)

Co-authored-by: Adam Turner <[email protected]>

Author: pganssle

.github/CODEOWNERS

@@ -406,11 +406,15 @@ Lib/test/test_dataclasses/    @ericvsmith
 
 # Dates and times
 Doc/**/*time.rst                 @pganssle @abalkin
+Doc/library/zoneinfo.rst         @pganssle
 Include/datetime.h               @pganssle @abalkin
 Include/internal/pycore_time.h   @pganssle @abalkin
+Lib/test/test_zoneinfo/          @pganssle
+Lib/zoneinfo/                    @pganssle
 Lib/*time.py                     @pganssle @abalkin
 Lib/test/datetimetester.py       @pganssle @abalkin
 Lib/test/test_*time.py           @pganssle @abalkin
+Modules/*zoneinfo*               @pganssle
 Modules/*time*                   @pganssle @abalkin
 Python/pytime.c                  @pganssle @abalkin