test(get_slice): update to upstream changes on fetched url

- pin fetched url to a tag reference

src/_tests_get_slice_test.v

@@ -2,13 +2,14 @@
 module vibe
 
 fn test_get_slice() {
-	resp := get_slice('https://raw.githubusercontent.com/vlang/v/master/doc/docs.md',
-		185_000, 10_000)!
+	resp := get_slice('https://raw.githubusercontent.com/vlang/v/refs/tags/0.4.8/doc/docs.md',
+		135_000, 10_000)!
 	assert resp.status == 200
 	assert resp.body.contains("Module {
-\tname: 'mymodule',
-\tdescription: 'My nice module wraps a simple C library.',
-\tversion: '0.0.1'
-\tdependencies: []
-}"), resp.body
+       name: 'mypackage'
+       description: 'My nice package.'
+       version: '0.0.1'
+       license: 'MIT'
+       dependencies: []
+   }"), resp.body
 }