Ensure libutf8proc-dev is installed in Debian environment. (#1345)

Follow up for f63348e

Author: rcsanchez97

.evergreen/scripts/debian_package_build.sh

@@ -43,7 +43,7 @@ export DEBOOTSTRAP_DIR=`pwd`/debootstrap.git
 sudo -E ./debootstrap.git/debootstrap unstable ./unstable-chroot/ http://cdn-aws.deb.debian.org/debian
 cp -a mongoc ./unstable-chroot/tmp/
 sudo chroot ./unstable-chroot /bin/bash -c "(\
-  apt-get install -y build-essential git-buildpackage fakeroot debhelper cmake libssl-dev pkg-config python3-sphinx zlib1g-dev libicu-dev libsasl2-dev libsnappy-dev libzstd-dev libmongocrypt-dev libjs-mathjax && \
+  apt-get install -y build-essential git-buildpackage fakeroot debhelper cmake libssl-dev pkg-config python3-sphinx zlib1g-dev libicu-dev libsasl2-dev libsnappy-dev libzstd-dev libmongocrypt-dev libjs-mathjax libutf8proc-dev && \
   chown -R root:root /tmp/mongoc && \
   cd /tmp/mongoc && \
   git clean -fdx && \