message: Fix typos in TFL Micro documentation
diff: @@ -65,7 +65,7 @@ you can easily explore the code in a cross-platform IDE.
  ## Building Portable Reference Code using Make
  -It's easy to build portable reference code directly from Github using make if
  +It's easy to build portable reference code directly from GitHub using make if
  you're on a Linux or OS X machine.
  - Open a terminal
  @@ -261,7 +261,7 @@ You should see the following log with the magic string `~~~ALL TEST PASSED~~~`:
  02:25:22.4253 [DEBUG] uart0: [+0.16ms host +0s virt 0.28s virt from start] Progam has exited with code:0x00000000
  ```
  -## Building for Ambiq Micro Apollo3Blue EVB
  +## Building for Ambiq Micro Apollo3Blue EVB using Make
  Follow these steps to get the pushbutton yes/no example working on Apollo 3:
  @@ -713,7 +713,7 @@ exist.
  So far, I've recommended that you use the standalone generated projects for your
  system. You might be wondering why you're not just checking out the full
  -[TensorFlow codebase from Github](https://github.com/tensorflow/tensorflow/)?
  +[TensorFlow codebase from GitHub](https://github.com/tensorflow/tensorflow/)?
  The main reason is that there is a lot more diversity of architectures, IDEs,
  support libraries, and operating systems in the embedded world. Many of the
  toolchains require their own copy of source files, or a list of sources to be
  @@ -749,7 +749,7 @@ wider community? The first step is to pick a tag name for your platform. This
  can either be the operating system (for example 'mbed'), the name of a device
  ('bluepill'), or some other text that describes it. This should be a short
  string with no spaces or special characters. Log in or create an account on
  -Github, fork the full
  +GitHub, fork the full
  [TensorFlow codebase](https://github.com/tensorflow/tensorflow/) using the
  'Fork' button on the top left, and then grab your fork by using a command like
  `git clone https://github.com/<your user name>/tensorflow`.
  