Update readthedocs config

Issue-ID: NONRTRIC-921
Change-Id: I3a7263acd3da4f030cca0d4571a1338bcf45ee2d
Signed-off-by: ktimoney <kevin.timoney@est.tech>
(cherry picked from commit c8869f47f6ab67e0a1516cb0eca517ef31ba9a10)
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 3797dc8..862cc04 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,3 +1,20 @@
+#  ============LICENSE_START===============================================
+#  Copyright (C) 2020-2023 Nordix Foundation. All rights reserved.
+#  ========================================================================
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#  ============LICENSE_END=================================================
+#
+
 ---
 # .readthedocs.yml
 # Read the Docs configuration file
@@ -9,12 +26,13 @@
   - htmlzip
 
 build:
-  image: latest
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
 
 python:
-  version: 3.7
   install:
-    - requirements: docs/requirements-docs.txt
+  - requirements: docs/requirements-docs.txt
 
 sphinx:
   configuration: docs/conf.py
diff --git a/docs/index.rst b/docs/index.rst
index b96a895..95bc3a9 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -1,6 +1,6 @@
 .. This work is licensed under a Creative Commons Attribution 4.0 International License.
 .. SPDX-License-Identifier: CC-BY-4.0
-.. Copyright (C) 2021-2022 Nordix
+.. Copyright (C) 2021-2023 Nordix
 
 .. |nbsp| unicode:: 0xA0
    :trim: