Tweak the help text of --no-app-name option

Author: dlax

docs/man/pg_activity.1

@@ -495,7 +495,7 @@ required by another session. It shows following information:
 .IP "\fB\-\-no\-app\-name\fR" 2
 .IX Item "--no-app-name"
 .Vb 1
-\&        Disable App.
+\&        Disable APP.
 .Ve
 .SS "\s-1HEADER DISPLAY OPTIONS\s0"
 .IX Subsection "HEADER DISPLAY OPTIONS"

docs/man/pg_activity.pod

@@ -364,7 +364,7 @@ required by another session. It shows following information:
 
 =item B<--no-app-name>
 
-	Disable App.
+	Disable APP.
 
 =back
 

pgactivity/cli.py

@@ -324,7 +324,7 @@ def get_parser() -> ArgumentParser:
         "--no-app-name",
         dest="noappname",
         action="store_true",
-        help="Disable App.",
+        help="Disable APP.",
         default=False,
     )
 

tests/test_cli.txt

@@ -60,7 +60,7 @@ Process table display options:
   --no-write            Disable WRITE/s.
   --no-time             Disable TIME+.
   --no-wait             Disable W.
-  --no-app-name         Disable App.
+  --no-app-name         Disable APP.
 <BLANKLINE>
 Header display options:
   --no-inst-info        Hide instance information.