convvert slack values from json too

src/amcli.php

@@ -280,6 +280,7 @@ _wd("Parsed INI data: " . print_r($aIni, 1));
 // loop over all values and detect JSON strings to convert
 $aIni['meta']['tags']=_json2array($aIni['meta']['tags'] ?? null);
 $aIni['notifications']['email']=_json2array($aIni['notifications']['email'] ?? null);
+$aIni['notifications']['slack']=_json2array($aIni['notifications']['slack'] ?? null);
 
 // ----------------------------------------------------------------------