Clarify Precision function in Timelion Kibana (#58031)

* Closes issue 26100
Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: rshen91

src/plugins/timelion/server/series_functions/precision.js

@@ -32,12 +32,12 @@ export default new Chainable('precision', {
       name: 'precision',
       types: ['number'],
       help: i18n.translate('timelion.help.functions.precision.args.precisionHelpText', {
-        defaultMessage: 'Number of digits to round each value to',
+        defaultMessage: 'The number of digits to truncate each value to',
       }),
     },
   ],
   help: i18n.translate('timelion.help.functions.precisionHelpText', {
-    defaultMessage: 'number of digits to round the decimal portion of the value to',
+    defaultMessage: 'The number of digits to truncate the decimal portion of the value to',
   }),
   fn: async function precisionFn(args) {
     await alter(args, function(eachSeries, precision) {

x-pack/plugins/translations/translations/ja-JP.json

@@ -2697,8 +2697,6 @@
     "timelion.help.functions.points.args.symbolHelpText": "点のシンボルです。{validSymbols} の 1 つ",
     "timelion.help.functions.points.args.weightHelpText": "点の周りの太さです",
     "timelion.help.functions.pointsHelpText": "数列を点として表示します",
-    "timelion.help.functions.precision.args.precisionHelpText": "各値を四捨五入する桁数です",
-    "timelion.help.functions.precisionHelpText": "値の小数点以下の四捨五入する桁数です",
     "timelion.help.functions.props.args.globalHelpText": "各数列に対し、seriesList にプロップを設定します",
     "timelion.help.functions.propsHelpText": "数列に任意のプロパティを設定するため、自己責任で行ってください。例: {example}",
     "timelion.help.functions.quandl.args.codeHelpText": "プロットする Quandl コードです。これらは quandl.com に掲載されています。",

x-pack/plugins/translations/translations/zh-CN.json

@@ -2697,8 +2697,6 @@
     "timelion.help.functions.points.args.symbolHelpText": "点符号。以下选项之一：{validSymbols}",
     "timelion.help.functions.points.args.weightHelpText": "围绕点的线条粗细",
     "timelion.help.functions.pointsHelpText": "将序列显示为点",
-    "timelion.help.functions.precision.args.precisionHelpText": "将每个值舍入到的小数位数",
-    "timelion.help.functions.precisionHelpText": "将值的小数部分舍入到的小数位数",
     "timelion.help.functions.props.args.globalHelpText": "在 seriesList 与每个序列上设置属性",
     "timelion.help.functions.propsHelpText": "在序列上可设置任意属性，但请自担风险。例如 {example}",
     "timelion.help.functions.quandl.args.codeHelpText": "要绘图的 quandl 代码。可以在 quandl.com 找到这些内容。",