fix: change severity filter label to "Min severity"

Signed-off-by: Marek Libra <marek.libra@gmail.com>

.changeset/five-walls-carry.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-notifications': patch
+---
+
+Severity filter label newly contains "Min severity" to better describe range instead of exact value.

plugins/notifications/src/components/NotificationsFilters/NotificationsFilters.tsx

@@ -249,10 +249,12 @@ export const NotificationsFilters = ({
 
         <Grid item xs={12}>
           <FormControl fullWidth variant="outlined" size="small">
-            <InputLabel id="notifications-filter-severity">Severity</InputLabel>
+            <InputLabel id="notifications-filter-severity">
+              Min severity
+            </InputLabel>
 
             <Select
-              label="Severity"
+              label="Min severity"
               labelId="notifications-filter-severity"
               value={severity}
               onChange={handleOnSeverityChanged}