Update filtering on time-series doc page

ID changed out from underneath us. Use the code CUYA which seems to be used fairly broadly by park service including in the URLs of park website etc

Signed-off-by: Jason T. Brown <jason@astraea.earth>

Author: vpipkt

pyrasterframes/src/main/python/docs/time-series.pymd

@@ -41,8 +41,6 @@ def simplify(g, tol):
 park_vector = park_vector.withColumn('geo_simp', simplify('geometry', lit(0.001))) \
                          .select('geo_simp') \
                          .hint('broadcast')
-
-
 ```
 
 ## Catalog Read
@@ -56,7 +54,7 @@ park_cat = cat \
                     (cat.acquisition_date > lit('2018-02-19')) &
                     (cat.acquisition_date < lit('2018-07-01'))            
                     ) \
-            .crossJoin(park_vector.filter('OBJECTID == 380')) #only coyahuga
+            .crossJoin(park_vector.filter('UNIT_CODE == "CUVA"')) #only coyahuga
 
 ```