docs: readme.md updated

README.md

@@ -106,6 +106,7 @@ In application controls, these, amongst many other settings, can be customized w
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 | ```( tab )``` or ```( shift+tab )``` | Change panel, clicking on a panel also changes the selected panel.|
 | ```( ↑ ↓ )``` or ```( j k )``` or ```( PgUp PgDown )``` or ```( Home End )```| Change selected line in selected panel, mouse scroll also changes selected line.|
+| ```( ← → )``` | When logs panel selected, scroll horizontally across the text of the logs.|
 | ```( enter )```| Run selected docker command.|
 | ```( 1-9 )``` | Sort containers by heading, clicking on headings also sorts the selected column. |
 | ```( 0 )``` | Stop sorting.|