Update README

README.md

@@ -139,6 +139,7 @@ USAGE
 * [`mw app list-upgrade-candidates [INSTALLATION-ID]`](#mw-app-list-upgrade-candidates-installation-id)
 * [`mw app ssh [INSTALLATION-ID]`](#mw-app-ssh-installation-id)
 * [`mw app uninstall [INSTALLATION-ID]`](#mw-app-uninstall-installation-id)
+* [`mw app update [INSTALLATION-ID]`](#mw-app-update-installation-id)
 * [`mw app upgrade [INSTALLATION-ID]`](#mw-app-upgrade-installation-id)
 * [`mw app upload [INSTALLATION-ID]`](#mw-app-upload-installation-id)
 * [`mw app versions [APP]`](#mw-app-versions-app)
@@ -1896,23 +1897,59 @@ FLAG DESCRIPTIONS
     scripts), you can use this flag to easily get the IDs of created resources for further processing.
 ```
 
+## `mw app update [INSTALLATION-ID]`
+
+Update properties of an app installation (use 'upgrade' to update the app version)
+
+```
+USAGE
+  $ mw app update [INSTALLATION-ID] [-q] [--description <value>] [--entrypoint <value>] [--document-root <value>]
+
+ARGUMENTS
+  INSTALLATION-ID  ID or short ID of an app installation; this argument is optional if a default app installation is set
+                   in the context.
+
+FLAGS
+  -q, --quiet                  suppress process output and only display a machine-readable summary.
+      --description=<value>    update the description of the app installation
+      --document-root=<value>  update the document root of the app installation
+      --entrypoint=<value>     update the entrypoint of the app installation (Python and Node.js only)
+
+FLAG DESCRIPTIONS
+  -q, --quiet  suppress process output and only display a machine-readable summary.
+
+    This flag controls if you want to see the process output or only a summary. When using mw non-interactively (e.g. in
+    scripts), you can use this flag to easily get the IDs of created resources for further processing.
+
+  --description=<value>  update the description of the app installation
+
+    This flag updates the description of the app installation. If omitted, the description will not be changed.
+
+  --document-root=<value>  update the document root of the app installation
+
+    Updates the document root of the app installation. If omitted, the document root will not be changed. Note that not
+    all apps support this field.
+
+  --entrypoint=<value>  update the entrypoint of the app installation (Python and Node.js only)
+
+    Updates the entrypoint of the app installation. If omitted, the entrypoint will not be changed. Note that this field
+    is only available for some types of apps (like Python and Node.js).
+```
+
 ## `mw app upgrade [INSTALLATION-ID]`
 
 Upgrade app installation to target version
 
 ```
 USAGE
-  $ mw app upgrade [INSTALLATION-ID] [--target-version <value>] [-f] [-p <value>] [-q] [-w] [--wait-timeout
-    <value>]
+  $ mw app upgrade [INSTALLATION-ID] [--target-version <value>] [-f] [-q] [-w] [--wait-timeout <value>]
 
 ARGUMENTS
   INSTALLATION-ID  ID or short ID of an app installation; this argument is optional if a default app installation is set
                    in the context.
 
 FLAGS
   -f, --force                   Do not ask for confirmation.
-  -p, --project-id=<value>      ID or short ID of a project; this flag is optional if a default project is set in the
-                                context
   -q, --quiet                   suppress process output and only display a machine-readable summary.
   -w, --wait                    wait for the resource to be ready.
       --target-version=<value>  target version to upgrade app to; if omitted, target version will be prompted
@@ -1924,11 +1961,6 @@ DESCRIPTION
   Upgrade app installation to target version
 
 FLAG DESCRIPTIONS
-  -p, --project-id=<value>  ID or short ID of a project; this flag is optional if a default project is set in the context
-
-    May contain a short ID or a full ID of a project; you can also use the "mw context set --project-id=<VALUE>" command
-    to persistently set a default project for all commands that accept this flag.
-
   -q, --quiet  suppress process output and only display a machine-readable summary.
 
     This flag controls if you want to see the process output or only a summary. When using mw non-interactively (e.g. in