base: use alternative source for Sequencer module.

Official repository for Sequencer has been down for some time due to a
possible cyberattack [1]. While it is not restored, we are hosting the
needed files in an alternative server. This should be reverted once the
official servers are back online.

[1]: https://epics.anl.gov/tech-talk/2023/msg00910.php

base/install_modules.sh

@@ -39,7 +39,7 @@ install_github_module() {
 echo EPICS_BASE=${EPICS_BASE_PATH} > ${EPICS_MODULES_PATH}/../RELEASE
 
 # Build seq first since it doesn't depend on anything
-wget "http://www-csr.bessy.de/control/SoftDist/sequencer/releases/seq-$SEQUENCER_VERSION.tar.gz"
+wget "https://static.erico.dev/seq-$SEQUENCER_VERSION.tar.gz"
 tar -xf seq-$SEQUENCER_VERSION.tar.gz
 rm seq-$SEQUENCER_VERSION.tar.gz
 mv seq-$SEQUENCER_VERSION seq