WIP: include mising blog artifacts

This is a HACK to include the artifacts until I fix the problem. This commit would be
dropped later. I have to generate the artifacts in GutHub CI. The problem occured when I
switched from deploying manually to deploying with GitHub CI (I have overlooked this).

Author: drdv

.gitignore

@@ -3,5 +3,5 @@ __pycache__
 site
 src/blog/202412-python-strings/data
 src/blog/202412-python-strings/*.ipynb
-src/blog/202411-summer-walking-challenge/artifacts
-src/blog/202512-tracking-food/out
+#src/blog/202411-summer-walking-challenge/artifacts
+#src/blog/202512-tracking-food/out

Makefile

@@ -7,7 +7,7 @@ serve: build
 	@$(RUN) mkdocs serve --livereload -o
 
 ## Build site
-build: clean-site artifacts
+build: clean-site # artifacts
 	@$(RUN) mkdocs build
 
 ## Generate artifacts for all blogs