ci: switch to pkgconf on macOS

Change-Id: I0fa11498cca3f2243802bbb780c4fb260e02286b
diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index f067118..4020862 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -19,7 +19,7 @@
     pkg-config
     python3
 )
-FORMULAE=(boost openssl pkg-config)
+FORMULAE=(boost openssl pkgconf)
 PIP_PKGS=()
 case $JOB_NAME in
     *code-coverage)