chore: Update choose-native-plants version to 2.2.8

Author: ZacharyLeahan

.holo/sources/choose-native-plants.toml

@@ -1,3 +1,3 @@
 [holosource]
 url = "https://github.com/CodeForPhilly/pa-wildflower-selector"
-ref = "refs/tags/v2.0.7"
+ref = "refs/tags/v2.2.8"

choose-native-plants/release-values.yaml

@@ -1,6 +1,6 @@
 app:
   image:
-    tag: "2.0.7"
+    tag: "2.2.8
   # IMPORTANT: Only include environment variables here that are NOT already defined in the Helm chart template
   # The following environment variables are already defined in the template and should NOT be duplicated here:
   # - PAC_API_BASE_URL, PAC_API_KEY (from pac-api secret)