Update Announcements

Announcements.md

@@ -114,7 +114,7 @@ scientific computing and software development.
 
 # Alpha/beta/rc release
 
-**Subject**: [ANN] Spyder 6.0 alpha3 is released!
+**Subject**: [ANN] Spyder 6.0 alpha4 is released!
 
 
 Hi all,
@@ -125,7 +125,7 @@ I'm pleased to announce the second alpha of our next major version: Spyder **6.0
 We've been working on this version for more than one year now and it's working
 relatively well. There are still several bugs to squash but we encourage all
 people who like the bleeding edge to give it a try. This alpha version includes
-more than 532 commits over our latest alpha release (6.0.0a2).
+more than 230 commits over our latest alpha release (6.0.0a3).
 
 Spyder 6.0 comes with the following interesting new features and fixes:
 
@@ -137,20 +137,31 @@ Spyder 6.0 comes with the following interesting new features and fixes:
       enter the debugger afterwards.
     * Add submenu to the `Consoles` menu to start a new console for a specific
       Conda or Pyenv environment.
+    * Add ability to refresh the open Variable Explorer viewers to reflect the current
+      variable state.
+    * Show plots generated in the Variable Explorer or its viewers in the Plots pane.
     * Show Matplotlib backend state in status bar.
     * Make kernel restarts be much faster for the current interpreter.
-    * Turn `runfile`, `debugfile`, `runcell` and related commands to IPython magics.
+    * Turn `runfile`, `debugfile`, `runcell` and related commands into IPython magics.
 
 - Important fixes
+    * Environment variables declared in `~/.bashrc` or `~/.zhrc` are detected and
+      passed to the IPython console.
+    * Support all real number dtypes in the dataframe viewer.
     * Restore ability to load Hdf5 and Dicom files through the Variable Explorer
       (this was working in Spyder 4 and before).
 
 - New API features
-    * Generalize Run plugin to support generic inputs and executors. This allows
+    * `SpyderPluginV2.get_description` must be a static method now and
+      `SpyderPluginV2.get_icon` a class or static method. This is necessary to
+      display the list of available plugins in Preferences in a more user-friendly
+      way (see PR spyder-ide/spyder#21101).
+    * Generalize the Run plugin to support generic inputs and executors. This allows
       plugins to declare what kind of inputs (i.e. file, cell or selection) they
       can execute and how they will display the result.
-    * Add a new plugin for the files and symbols switcher.
+    * Add a new plugin called Switcher for the files and symbols switcher.
     * Declare a proper API for the Projects plugin.
+    * Remove the Breakpoints plugin and add its functionality to the Debugger one.
 
 For a more complete list of changes, please see our
 [changelog](https://github.com/spyder-ide/spyder/blob/master/changelogs/Spyder-6.md)
@@ -165,4 +176,4 @@ Or you can use pip with this command:
 
 
 Enjoy!
-Daniel
+Carlos