sphinx-lint: missing space after literal

Fix all instances of missing-space-after-literal as reported by 'make
sphinx-lint'.

(From yocto-docs rev: b562ea5563adc744703b10e0c9a530ed7476d51a)

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

documentation/sdk-manual/extensible.rst

@@ -802,7 +802,7 @@ the two modes:
 
       This instance of VSCode uses plugins that are useful for the development
       of the application. ``devtool ide-sdk`` generates the necessary
-      ``extensions.json``, ``settings.json``, ``tasks.json``and ``launch.json``
+      ``extensions.json``, ``settings.json``, ``tasks.json`` and ``launch.json``
       configuration files for all the involved plugins.
 
       When the source code folder present in the workspace folder is opened in