Feature #2877 v6.1.0-beta1 release (#2878)

* update version for beta1 release

* add release notes for beta1

* update script to help generate release notes to add a set of issues to be marked as pass because no extenral testing required, removed SonarQube complaints about duplicate string literals

* added missing issue

* rename 'Internal' category to 'Build, repository, and test' to be consistent with MET

docs/Users_Guide/existing_builds.rst

@@ -548,10 +548,10 @@ in the
             * Users should create a file like /work2/06612/tg859120/frontera/METplus/frontera.user_name.conf
               to set a personalized INPUT_BASE and OUTPUT_BASE.
 
-.. dropdown:: DockerHub - Coming Soon!
+.. dropdown:: DockerHub
 
    | **MET**
-   | *Last Updated:*
+   | *Last Updated:* January 24, 2025
 
       .. code-block:: ini
 
@@ -560,7 +560,7 @@ in the
      `dtcenter/met DockerHub <https://hub.docker.com/r/dtcenter/met>`_
 
    | **METplus**
-   | *Last Updated:*
+   | *Last Updated:* January 28, 2025
 
       .. code-block:: ini
 
@@ -569,7 +569,7 @@ in the
      `dtcenter/metplus DockerHub <https://hub.docker.com/r/dtcenter/metplus>`_
 
    | **METplus Analysis**
-   | *Last Updated:*
+   | *Last Updated:* January 28, 2025
 
       .. code-block:: ini