Format all instructions.append.md to start with an H1 (required but ignored) and H2

exercises/practice/anagram/.docs/instructions.append.md

@@ -1,3 +1,5 @@
 # Instructions Append
 
+## Track specific instructions
+
 You must return the anagrams in the same order as they are listed in the candidate words.

exercises/practice/hangman/.docs/instructions.append.md

@@ -1,5 +1,7 @@
 # Instructions Append
 
+## Track specific instructions
+
 Historically, Elm was using functional reactive programming until it specialized to using the Elm Architecture.
 
 Solve this exercise as if you were writing a web app using the Elm Architecture.

exercises/practice/palindrome-products/.docs/instructions.append.md

@@ -1,5 +1,7 @@
 # Instructions Append
 
+## Track specific instructions
+
 ```exercism/note
 Naive solutions may take a long time to pass the tests involving four digit factors, likely longer than the time limit allocated to the online test runner.
 You may need to work on the exercise locally to profile your solution.

exercises/practice/swift-scheduling/.docs/instructions.append.md

@@ -1,5 +1,7 @@
 # Instructions Append
 
+## Track specific instructions
+
 ```exercism/note
 `elm/time` is meant to display a time provided by the browser, not to manipulate dates and times.
 In real world applications, one would reach out to packages from the Elm community to manipulate dates and times, but since those are not accessible in the online editor, take this exercise as a challenge rather than as a practice of idiomatic Elm.

exercises/practice/wordy/.docs/instructions.append.md

@@ -1,3 +1,5 @@
-# Hints
+# Instructions append
 
-This is a perfect opportunity to learn `elm/parser` ([docs](https://package.elm-lang.org/packages/elm/parser/latest/))!
+## Track specific instructions
+
+This is a perfect opportunity to learn `elm/parser` ([docs](https://package.elm-lang.org/packages/elm/parser/latest/))!