Pin OpenSSL packages to apt snapshot

ober

6ac5bdc238699052844a7903863e28e61eadf75b

diff --git a/Dockerfile.qt b/Dockerfile.qt
index 489f588..86a42ea 100644
--- a/Dockerfile.qt
+++ b/Dockerfile.qt
@@ -31,7 +31,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates
       -e "s#https?://ports\\.ubuntu\\.com/ubuntu-ports/?#https://snapshot.ubuntu.com/ubuntu/${APT_SNAPSHOT}/#g" \
       /etc/apt/sources.list.d/ubuntu.sources && \
     rm -rf /var/lib/apt/lists/* && \
-    apt-get update && apt-get install -y --no-install-recommends --allow-downgrades \
+    apt-get update && \
+    ssl_version="$(apt-cache policy libssl-dev | awk '/Candidate:/ { print $2 }')" && \
+    apt-get install -y --no-install-recommends --allow-downgrades \
     bash \
     ca-certificates \
     cmake \
@@ -42,11 +44,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates
     gzip \
     libgl1-mesa-dev \
     libncurses-dev \
-    libssl3t64 \
-    libssl-dev \
+    libssl3t64="$ssl_version" \
+    libssl-dev="$ssl_version" \
     libudev-dev \
     make \
-    openssl \
+    openssl="$ssl_version" \
     patchelf \
     pkg-config \
     qt6-base-dev \