release function graph in public

Reviewed-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-authored-by: tischrei <tino.schreiber@t-systems.com>
Co-committed-by: tischrei <tino.schreiber@t-systems.com>

otc_metadata/data/documents/fg-api-ref.yaml

@@ -1,6 +1,5 @@
 ---
 hc_location: api/functiongraph
-environment: internal
 html_location: docs/fg/api-ref
 link: /function-graph/api-ref/
 pdf_name: fg-api-ref

otc_metadata/data/documents/fg-umn.yaml

@@ -1,6 +1,5 @@
 ---
 hc_location: usermanual/functiongraph
-environment: internal
 html_location: docs/fg/umn
 link: /function-graph/umn/
 pdf_name: fg-umn

otc_metadata/data/services/fg.yaml

@@ -1,5 +1,5 @@
 ---
-environment: internal
+environment: public
 repositories:
 - environment: internal
   repo: docs/function-graph

tools/sync_doc_repo.py

@@ -95,12 +95,12 @@ def process_repositories(args, service):
                 f"due to the doc-type filter."
             )
             continue
-        if doc.get("environment"):
-            logging.info(
-                f"Skipping synchronizing {doc['title']} "
-                f"since it is environment bound."
-            )
-            continue
+        # if doc.get("environment"):
+        #     logging.info(
+        #         f"Skipping synchronizing {doc['title']} "
+        #         f"since it is environment bound."
+        #     )
+        #     continue
 
         branch_name = f"{args.branch_name}#{doc['type']}"
         remote_ref = SymbolicReference.create(