MAINT: allow section in the config for caosdb-crawler

Summary

Added a section for Caosdb Crawler: [caoscrawler]

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src/caosdb/schema-pycaosdb-ini.yml

@@ -106,6 +106,9 @@ schema-pycaosdb-ini:
     advancedtools:
       description: "Configuration settings for the caosadvancedtools."
       additionalProperties: true
+    caoscrawler:
+      description: "Configuration settings for the CaosDB Crawler."
+      additionalProperties: true
     sss_helper:
       description: "Configuration settings for server-side scripting."
       additionalProperties: true