Update angular to 20

src/app/components/match-sheets/match-sheets.component.ts

@@ -1,5 +1,5 @@
 import {Component, OnInit} from '@angular/core';
-import {MatCard, MatCardContent, MatCardHeader} from "@angular/material/card";
+import {MatCard, MatCardContent} from "@angular/material/card";
 import {TournamentService} from "../../service/tournament.service";
 import {ActivatedRoute, Router} from "@angular/router";
 import {Tournament} from "../../model/tournament";
@@ -15,16 +15,15 @@ import {TitleService} from "../../service/title.service";
 
 @Component({
     selector: 'app-match-sheets',
-    imports: [
-        MatCard,
-        MatCardHeader,
-        MatCardContent,
-        TeamPipe,
-        NgForOf,
-        MatFormField,
-        MatInput,
-        ReactiveFormsModule
-    ],
+  imports: [
+    MatCard,
+    MatCardContent,
+    TeamPipe,
+    NgForOf,
+    MatFormField,
+    MatInput,
+    ReactiveFormsModule
+  ],
     providers: [
         TeamPipe,
         FullNamePipe