install gnuplot via easyconfig PR that fixing linking error to Lua dependency

Author: boegel

eessi-2023.06-eb-4.8.0-2021b.yml

@@ -4,5 +4,9 @@ easyconfigs:
       # see https://github.com/easybuilders/easybuild-easyconfigs/pull/18746
       options:
         from-pr: 18746
-  - gnuplot-5.4.2-GCCcore-11.2.0.eb
+  - gnuplot-5.4.2-GCCcore-11.2.0.eb:
+      # make sure that Lua dependency is correctly picked up,
+      # see https://github.com/easybuilders/easybuild-easyconfigs/pull/19261
+      options:
+        from-pr: 19261
   - OpenFOAM-v2112-foss-2021b.eb