README.md: Acknowledge Elazar Leibovich

Add Elazar Leibovich to the list of contributors for #12, #13 and commit
0c6df1b ("debian: add debian packaging files").

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

Author: tklauser

README.md

@@ -69,6 +69,7 @@ llmnrd is authored and maintained by Tobias Klauser <tklauser@distanz.ch>
 The following people contributed patches and ideas, found and reported bugs or
 otherwise helped in the development of llmnrd:
 
+* Elazar Leibovich (@elazarl)
 * Martin Hauke
 * Michael Evertz (@dvl-mevertz)
 * Schimmelreiter (@Schimmelreiter)