frame-support: Rename tests to express what they are doing (#11147)

Fixes: https://github.com/paritytech/substrate/issues/11145

substrate/frame/support/src/storage/bounded_vec.rs

@@ -693,7 +693,7 @@ pub mod test {
 	}
 
 	#[test]
-	fn try_append_is_correct() {
+	fn bound_returns_correct_value() {
 		assert_eq!(BoundedVec::<u32, ConstU32<7>>::bound(), 7);
 	}
 

substrate/frame/support/src/storage/weak_bounded_vec.rs

@@ -330,7 +330,7 @@ pub mod test {
 	}
 
 	#[test]
-	fn try_append_is_correct() {
+	fn bound_returns_correct_value() {
 		assert_eq!(WeakBoundedVec::<u32, ConstU32<7>>::bound(), 7);
 	}