Tiny examples for --upload (#3588)

Author: AbrilRBS

reference/commands/install.rst

@@ -214,8 +214,14 @@ Read more about lockfiles in :ref:`tutorial_consuming_packages_versioning_lockfi
 Update
 ------
 
-The ``conan install`` command has a ``--update`` argument that will force the re-evaluation of the selected items of the dependency graph,
+The ``conan install`` command has an ``--update`` argument that will force the re-evaluation of the selected items of the dependency graph,
 allowing for the update of the dependencies to the latest version if using version ranges, or to the latest revision of the same version,
 when those versions are not locked in the given lockfile. Passing ``--update`` will check every package in the dependency graph,
 but it is also possible to pass a package name to the ``--update`` argument (it can be added to the command more than once with different names),
 to only update those packages, which avoids the re-evaluation of the whole graph.
+
+.. code-block:: bash
+
+   $ conan install . --update  # Update all packages in the graph
+   $ conan install . --update=openssl  # Update only the openssl package
+   $ conan install . --update=openssl --update=boost  # Update both openssl and boost packages