Github: Add 0.6.1 to issue template (#841)

* Github: Add 0.6.1 to issue template

* Add to docs as a release step

Author: Fokko

.github/ISSUE_TEMPLATE/iceberg_bug_report.yml

@@ -9,7 +9,8 @@ body:
       description: What Apache Iceberg version are you using?
       multiple: false
       options:
-        - "0.6.0 (latest release)"
+        - "0.6.1 (latest release)"
+        - "0.6.0"
         - "0.5.0"
         - "0.4.0"
         - "0.3.0"

mkdocs/docs/how-to-release.md

@@ -214,3 +214,7 @@ Thanks to everyone for contributing!
 ## Release the docs
 
 A committer triggers the [`Python Docs` Github Actions](https://github.com/apache/iceberg-python/actions/workflows/python-ci-docs.yml) through the UI by selecting the branch that just has been released. This will publish the new docs.
+
+## Update the Github template
+
+Make sure to create a PR to update the [GitHub issues template](https://github.com/apache/iceberg-python/blob/main/.github/ISSUE_TEMPLATE/iceberg_bug_report.yml) with the latest version.