Add @Nilsonfsilva to the list of contributors.

Indeed, since @Nilsonfsilva discovered a fatal error as described
in #328 and fixed by 3c3405f
he should be ackowledged as one of the contributor of the project.

README.rst

@@ -158,6 +158,7 @@ contribution(s) and or issue report which made or make `PyFunceble`_ a better to
 -   Human Being - `@T145`_
 -   Imre Kristoffer Eilertsen - `@DandelionSprout`_
 -   jawz101 - `@jawz101`_
+-   Josenilson Ferreira da SIlva - `@Nilsonfsilva`_
 -   keczuppp - `@keczuppp`_
 -   kowith337 - `@kowith337`_
 -   Mitchell Krog - `@mitchellkrogza`_
@@ -286,6 +287,7 @@ License
 .. _@kowith337: https://github.com/kowith337
 .. _@mitchellkrogza: https://github.com/mitchellkrogza
 .. _@NeolithEra: https://github.com/NeolithEra
+.. _@Nilsonfsilva: https://github.com/Nilsonfsilva
 .. _@Odyseus: https://github.com/Odyseus
 .. _@opav: https://github.com/opav
 .. _@pi-hole: https://github.com/pi-hole/pi-hole

docs/contributors.rst

@@ -25,6 +25,7 @@ contribution(s) and or issue report which made or make `PyFunceble`_ a better to
 -   Human Being - `@T145`_
 -   Imre Kristoffer Eilertsen - `@DandelionSprout`_
 -   jawz101 - `@jawz101`_
+-   Josenilson Ferreira da SIlva - `@Nilsonfsilva`_
 -   keczuppp - `@keczuppp`_
 -   kowith337 - `@kowith337`_
 -   Mitchell Krog - `@mitchellkrogza`_
@@ -57,6 +58,7 @@ contribution(s) and or issue report which made or make `PyFunceble`_ a better to
 .. _@kowith337: https://github.com/kowith337
 .. _@mitchellkrogza: https://github.com/mitchellkrogza
 .. _@NeolithEra: https://github.com/NeolithEra
+.. _@Nilsonfsilva: https://github.com/Nilsonfsilva
 .. _@Odyseus: https://github.com/Odyseus
 .. _@opav: https://github.com/opav
 .. _@rusty-snake: https://github.com/rusty-snake