docs: move release process docs to contributor guide (#3492)

* docs: move release process docs to contributor guide

* Update docs/source/contributor-guide/release_process.md

Co-authored-by: Oleks V <comphead@users.noreply.github.com>

---------

Co-authored-by: Oleks V <comphead@users.noreply.github.com>

Author: andygrove

docs/source/contributor-guide/index.md

@@ -39,5 +39,6 @@ Profiling Native Code <profiling_native_code>
 Spark SQL Tests <spark-sql-tests.md>
 SQL File Tests <sql-file-tests.md>
 Roadmap <roadmap.md>
+Release Process <release_process>
 Github and Issue Tracker <https://github.com/apache/datafusion-comet>
 ```

dev/release/README.md …rce/contributor-guide/release_process.mddev/release/README.md renamed to docs/source/contributor-guide/release_process.md dev/release/README.md renamed to docs/source/contributor-guide/release_process.md

@@ -1,20 +1,20 @@
-<!--
-Licensed to the Apache Software Foundation (ASF) under one
-or more contributor license agreements.  See the NOTICE file
-distributed with this work for additional information
-regarding copyright ownership.  The ASF licenses this file
-to you 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.
+<!---
+  Licensed to the Apache Software Foundation (ASF) under one
+  or more contributor license agreements.  See the NOTICE file
+  distributed with this work for additional information
+  regarding copyright ownership.  The ASF licenses this file
+  to you 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.
 -->
 
 # Apache DataFusion Comet: Release Process
@@ -80,11 +80,12 @@ Create a PR against the main branch to prepare for developing the next release:
 ### Generate the Change Log
 
 Generate a change log to cover changes between the previous release and the release branch HEAD by running
-the provided `generate-changelog.py` script.
+the provided `dev/release/generate-changelog.py`.
 
 It is recommended that you set up a virtual Python environment and then install the dependencies:
 
 ```shell
+cd dev/release
 python3 -m venv venv
 source venv/bin/activate
 pip3 install -r requirements.txt