preface: Add additional contributors

preface.asciidoc

@@ -209,6 +209,7 @@ The following is a list of notable GitHub contributors:
 * Frank Höger (francyi)
 * Gaurav Rana (bitcoinsSG)
 * genjix
+* Gerry Smith (Hermetic)
 * Gus (netpoe)
 * halseth
 * Harry Moreno (morenoh149)
@@ -230,11 +231,13 @@ The following is a list of notable GitHub contributors:
 * Jonathan Cross (jonathancross)
 * Jorgeminator
 * Kai Bakker (kaibakker)
+* lilianrambu
 * Lucas Betschart (lclc)
 * Magomed Aliev (30mb1)
 * Mai-Hsuan Chia (mhchia)
 * Marco Falke (MarcoFalke)
 * María Martín (mmartinbar)
+* Mark Pors (pors)
 * Marzig (marzig76)
 * Matt McGivney (mattmcgiv)
 * Maximilian Reichel (phramz)
@@ -246,11 +249,13 @@ The following is a list of notable GitHub contributors:
 * montvid
 * Nagaraj Hubli (nagarajhubli)
 * Nekomata (nekomata-3)
+* nekonenene
 * Nhan Vu (jobnomade)
 * Nicholas Chen (nickycutesc)
 * Omar Boukli-Hacene (oboukli)
 * Philipp Gille (philippgille)
 * Reproducibility Matters (TheCharlatan)
+* Reuben Thomas (rrthomas)
 * Robert Furse (Rfurse)
 * Richard Kiss (richardkiss)
 * Ruben Alexander (hizzvizz)