fix(ui): use octicon-repo-forked in repo list (#10227)

Closes: #10153

![Screenshot of the fixed icon](/attachments/38559840-9cd0-4e37-9a25-106d21db8a42)

Co-authored-by: 0ko <0ko@noreply.codeberg.org>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/10227
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Co-authored-by: nachtjasmin <nachtjasmin@posteo.de>
Co-committed-by: nachtjasmin <nachtjasmin@posteo.de>

templates/explore/repo_list.tmpl

@@ -55,7 +55,7 @@
 									data-tooltip-content="{{ctx.Locale.TrPluralString .NumForks "fork.n_forks" (ctx.Locale.PrettyNumber .NumForks)}}"
 								{{end}}
 								>
-								{{svg "octicon-git-branch" 16}}
+								{{svg "octicon-repo-forked" 16}}
 								{{CountFmt .NumForks}}
 							</a>
 						{{end}}

tests/integration/explore_repos_test.go

@@ -24,6 +24,10 @@ func testExploreStarForkCounters(t *testing.T, repoQuery, expectedStars, expecte
 
 	assert.Equal(t, expectedStars, starsAriaLabel)
 	assert.Equal(t, expectedForks, forksAriaLabel)
+
+	// Verify that correct icons are used
+	assert.True(t, repoListEntry.Find("a[href$='/stars'] > svg").HasClass("octicon-star"))
+	assert.True(t, repoListEntry.Find("a[href$='/forks'] > svg").HasClass("octicon-repo-forked"))
 }
 
 func TestExploreRepos(t *testing.T) {