Update the third party notices file to reference the floating point number algorithm (dotnet#13920)

Author: AlexGhiondea

THIRD-PARTY-NOTICES.TXT

@@ -1,4 +1,4 @@
-.NET Core uses third-party libraries or other resources that may be
+.NET Core uses third-party libraries or other resources that may be
 distributed under licenses different than the .NET Core software.
 
 Attributions and license notices for test cases originally authored by
@@ -196,3 +196,28 @@ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+License notice for the Printing Floating-Point Numbers 
+/******************************************************************************
+  Copyright (c) 2014 Ryan Juckett
+  http://www.ryanjuckett.com/
+ 
+  This software is provided 'as-is', without any express or implied
+  warranty. In no event will the authors be held liable for any damages
+  arising from the use of this software.
+ 
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+ 
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+ 
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+ 
+  3. This notice may not be removed or altered from any source
+     distribution.
+******************************************************************************/