docs: fix dataFrom.find in ExternalSecret api example (#3633)

Signed-off-by: Sverre Boschman <1142569+sboschman@users.noreply.github.com>

docs/snippets/full-external-secret.yaml

@@ -108,8 +108,6 @@ spec:
         target: "rewriting-${1}-with-groups"
   - find:
       path: path-to-filter
-          source: "exp-(.*?)-ression"
-          target: "rewriting-${1}-with-groups"
       name:
         regexp: ".*foobar.*"
       tags: