Add label to table checkboxes

- Span with class sr-only added to table checkboxes
- Verified passed DAP

Signed-off-by: Dixsie Wolmers <dixsie@ibm.com>
Change-Id: If6dff636762e6cc70c2f5b345827aa1385a31c97
diff --git a/src/views/Health/Sensors/Sensors.vue b/src/views/Health/Sensors/Sensors.vue
index e1cea82..c9da6ab 100644
--- a/src/views/Health/Sensors/Sensors.vue
+++ b/src/views/Health/Sensors/Sensors.vue
@@ -61,13 +61,17 @@
               v-model="tableHeaderCheckboxModel"
               :indeterminate="tableHeaderCheckboxIndeterminate"
               @change="onChangeHeaderCheckbox($refs.table)"
-            />
+            >
+              <span class="sr-only">{{ $t('global.table.selectAll') }}</span>
+            </b-form-checkbox>
           </template>
           <template #cell(checkbox)="row">
             <b-form-checkbox
               v-model="row.rowSelected"
               @change="toggleSelectRow($refs.table, row.index)"
-            />
+            >
+              <span class="sr-only">{{ $t('global.table.selectItem') }}</span>
+            </b-form-checkbox>
           </template>
 
           <template #cell(status)="{ value }">