[plugin-jenkins] Add tooltip to Jenkins build rerun (#3251)

* Add tooltop to Jenkins build rerun

* Add tooltip to spelling

.changeset/calm-emus-push.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-jenkins': minor
+---
+
+Add tooltip for Jenkins rerun button

.github/styles/vocab.txt

@@ -191,6 +191,7 @@ toc
 tolerations
 Tolerations
 toolsets
+tooltip
 touchpoints
 ui
 upvote

plugins/jenkins/src/components/BuildsPage/lib/CITable/CITable.tsx

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 import React, { FC } from 'react';
-import { Box, IconButton, Link, Typography } from '@material-ui/core';
+import { Box, IconButton, Link, Typography, Tooltip } from '@material-ui/core';
 import RetryIcon from '@material-ui/icons/Replay';
 import GitHubIcon from '@material-ui/icons/GitHub';
 import { generatePath, Link as RouterLink } from 'react-router-dom';
@@ -179,9 +179,11 @@ const generatedColumns: TableColumn[] = [
     title: 'Actions',
     sorting: false,
     render: (row: Partial<CITableBuildInfo>) => (
-      <IconButton onClick={row.onRestartClick}>
-        <RetryIcon />
-      </IconButton>
+      <Tooltip title="Rerun build">
+        <IconButton onClick={row.onRestartClick}>
+          <RetryIcon />
+        </IconButton>
+      </Tooltip>
     ),
     width: '10%',
   },