Update link labels

Author: bzaczynski

wordcount/tests/task_02.py

@@ -13,7 +13,7 @@
     "Splitting, Concatenating, and Joining Strings in Python",
 )
 @tutorial("len-python-function", "Using the `len()` Function in Python")
-@tutorial("python-variables", "Variables in Python")
+@tutorial("python-variables", "Variables in Python: Usage and Best Practices")
 @tutorial("python-print", "Your Guide to the Python `print()` Function")
 class Test:
     def test_reports_zeros_on_an_empty_stream(self, wc):

wordcount/tests/task_07.py

@@ -7,7 +7,7 @@
     name="Read Data From Multiple Files",
     url="https://realpython.com/lessons/wordcount-read-data-from-multiple-files-task/",
 )
-@tutorial("python-for-loop", 'Python "for" Loops (Definite Iteration)')
+@tutorial("python-for-loop", 'Python for Loops: The Pythonic Way')
 @tutorial("python-list", "Python's list Data Type: A Deep Dive With Examples")
 @tutorial(
     "list-comprehension-python", "When to Use a List Comprehension in Python"