deploy: redeploy emacs (#2521)

Author: matz-e

bluebrain/deployment/environments/externals.yaml

@@ -16,6 +16,7 @@ spack:
           - darshan-util
           - doxygen
           - environment-modules
+          - emacs  # hugo dictus needs
           - flex
           - ffmpeg
           - gdb
@@ -104,6 +105,7 @@ spack:
     - darshan-runtime
     - darshan-util
     - doxygen
+    - emacs~tls+json+treesitter  # hugo dictus needs
     - [email protected]
     - ffmpeg+libx264
     - flex