Improve --help to mention all the command options

docs/content/manual/manual.yml

@@ -104,7 +104,7 @@ sections:
       You can affect how jq reads and writes its input and output
       using some command-line options:
 
-      * `--version`:
+      * `--version`/`-V`:
 
         Output the jq version and exit with zero.
 

docs/content/manual/v1.4/manual.yml

@@ -93,7 +93,7 @@ sections:
       You can affect how jq reads and writes its input and output
       using some command-line options:
 
-      * `--version`:
+      * `--version`/`-V`:
 
         Output the jq version and exit with zero.
 

docs/content/manual/v1.5/manual.yml

@@ -95,7 +95,7 @@ sections:
       You can affect how jq reads and writes its input and output
       using some command-line options:
 
-      * `--version`:
+      * `--version`/`-V`:
 
         Output the jq version and exit with zero.
 

docs/content/manual/v1.6/manual.yml

@@ -103,7 +103,7 @@ sections:
       You can affect how jq reads and writes its input and output
       using some command-line options:
 
-      * `--version`:
+      * `--version`/`-V`:
 
         Output the jq version and exit with zero.