Hugo: remove option 'panicOnWarning'

Hugo v0.130.0 issues a warning regarding the deprecation of the .Site.IsMultiLingual
configuration. However, the Relearn theme is somehow tied to this configuration. So
for the time being, let's ease our own configuration a bit and not bail out from mere
warnings.

see McShelby/hugo-theme-relearn#877

examples/hugo-lecture/Makefile

@@ -93,7 +93,7 @@ DOT_ARGS       = -Tpng
 PANDOC_ARGS    = --metadata-file=$(METADATA)  $(PANDOC_DIRS)
 
 ## Define options to be used by Hugo
-HUGO_ARGS      = --config hugo.yaml,$(HUGO_LOCAL)  $(HUGO_DIRS)  --contentDir $(TEMP_DIR)  --destination $(WEB_OUTPUT_DIR)  --printPathWarnings --panicOnWarning
+HUGO_ARGS      = --config hugo.yaml,$(HUGO_LOCAL)  $(HUGO_DIRS)  --contentDir $(TEMP_DIR)  --destination $(WEB_OUTPUT_DIR)  --printPathWarnings #--panicOnWarning
 
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