Fix sphinx

Author: tannewt

README.rst

@@ -17,7 +17,7 @@ Introduction
     :width: 300px
 
 The HC-SR04 is an inexpensive solution for measuring distances using microcontrollers. This library provides a simple
-driver for controlling these sensors from `CircuitPython`_.
+driver for controlling these sensors from CircuitPython.
 
 Dependencies
 =============

adafruit_hcsr04.py

@@ -20,6 +20,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 """
+`adafruit_hcsr04`
+====================================================
+
 A CircuitPython library for the HC-SR04 ultrasonic range sensor.
 
 The HC-SR04 functions by sending an ultrasonic signal, which is reflected by