fix link for caf

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

otc_metadata/data/documents/ac-cloud-adoption-framework.yaml

@@ -1,6 +1,6 @@
 ---
 environment: public
-link: /architecture-center/cloud-adoption-framework/
+link: /architecture-center/caf/
 pdf_name: architecture-center-cloud-adoption-framework
 rst_location: doc/caf/source
 service_type: ac

otc_metadata/templates/doc_requirements.txt.j2

@@ -1,6 +1,6 @@
 sphinx>=2.0.0,!=2.1.0 # BSD
 {% if target_environment == 'public' %}
-otcdocstheme<1.0.0 # Apache-2.0
+otcdocstheme<2.0.0 # Apache-2.0
 {% elif target_environment == 'internal' %}
 otcdocstheme # Apache-2.0
 {% else %}