docker: update LLVM debian repo for Ubuntu Orcular migration

When migrating from Ubuntu Matis to Orcular in afea41b, the LLVM debian
package repository configuration wasn't updated accordingly. This caused
Docker builds to fail.

This commit updates the repository configuration to match the new Ubuntu
Orcular base image.

Fixes scylladb#2656

Signed-off-by: Kefu Chai <[email protected]>

docker/dev/Dockerfile

@@ -6,9 +6,9 @@ RUN --mount=type=bind,source=./install-dependencies.sh,target=/install-dependenc
     apt-get update && apt-get install -y \
     curl \
     gnupg \
-    && echo "deb http://apt.llvm.org/mantic/ llvm-toolchain-oracular-18 main" \
+    && echo "deb http://apt.llvm.org/oracular/ llvm-toolchain-oracular-18 main" \
     >> /etc/apt/sources.list.d/llvm.list \
-    && echo "deb http://apt.llvm.org/mantic/ llvm-toolchain-oracular-19 main" \
+    && echo "deb http://apt.llvm.org/oracular/ llvm-toolchain-oracular-19 main" \
     >> /etc/apt/sources.list.d/llvm.list \
     && curl -sSL https://apt.llvm.org/llvm-snapshot.gpg.key -o /etc/apt/trusted.gpg.d/apt.llvm.org.asc \
     && apt-get update && apt-get install -y \