chore(jenkins): Update Jenkins plugins (#1098)

Author: gounthar

dockerfiles/plugins.txt

@@ -37,7 +37,7 @@ jquery3-api:3.7.1-3
 junit:1319.v000471ca_e5e2
 locale:566.v3323643741cc
 mailer:489.vd4b_25144138f
-matrix-auth:3.2.5
+matrix-auth:3.2.6
 matrix-project:847.v88a_f90ff9f20
 metrics:4.2.21-464.vc9fa_a_0d6265d
 mina-sshd-api-common:2.14.0-143.v2b_362fc39576