Edit build_profiles.md

Fix note formatting, and edit for precise language.

Author: Amanda Butler

docs/tools/CLI/build_profiles.md

@@ -18,7 +18,7 @@ Arm Mbed OS 5 defines three collections of toolchain flags used during the build
 - Easy to step through code with a debugger.
 - Disabled sleep mode.
 
-**NOTE: The debug profile uses optimization flags that may cause unwanted behavior during debugging (eg: out-of-order jumps, optimized-out variables). If this occurs, you can try setting the compiler's optimization setting to the lowest possible (ie: for GCC, change `-Og` to `-O0`). See your toolchain's documentation for more information. **
+<span class="notes">**Note:** The debug profile uses optimization flags that may cause unwanted behavior during debugging (such as out-of-order jumps and optimized-out variables). If this occurs, you can set the compiler to the lowest possible optimization setting (for example, change `-Og` to `-O0` for GCC). See your toolchain's documentation for more information.</span>
 
 ## Release