Update make docs procedure (#310)

To test the changes, run the following and browse to URL output by the
script:

```console
git fetch
git checkout origin/update-make-docs
cd docs
make docs
```

---------

Co-authored-by: grafanabot <bot@grafana.com>
Co-authored-by: Zoltán Bedi <zoltan.bedi@gmail.com>

Author: 3 people

docs/docs.mk

@@ -120,3 +120,12 @@ update: ## Fetch the latest version of this Makefile and the `make-docs` script
 	curl -s -LO https://raw.githubusercontent.com/grafana/writers-toolkit/main/docs/docs.mk
 	curl -s -LO https://raw.githubusercontent.com/grafana/writers-toolkit/main/docs/make-docs
 	chmod +x make-docs
+
+# ls static/templates/ | sed 's/-template\.md//' | xargs
+TOPIC_TYPES := concept multiple-tasks reference section task tutorial visualization
+.PHONY: $(patsubst %,topic/%,$(TOPIC_TYPES))
+topic/%: ## Create a topic from the Writers' Toolkit template. Specify the topic type as the target, for example, `make topic/task TOPIC_PATH=sources/my-new-topic.md`.
+$(patsubst %,topic/%,$(TOPIC_TYPES)):
+	$(if $(TOPIC_PATH),,$(error "You must set the TOPIC_PATH variable to the path where the $(@F) topic will be created. For example: make $(@) TOPIC_PATH=sources/my-new-topic.md"))
+	mkdir -p $(dir $(TOPIC_PATH))
+	curl -s -o $(TOPIC_PATH) https://raw.githubusercontent.com/grafana/writers-toolkit/refs/heads/main/docs/static/templates/$(@F)-template.md

docs/make-docs

@@ -8,6 +8,24 @@
 # [Semantic versioning](https://semver.org/) is used to help the reader identify the significance of changes.
 # Changes are relevant to this script and the support docs.mk GNU Make interface.
 #
+# ## 8.5.2 (2025-02-28)
+#
+# ### Fixed
+#
+# - topic/<KIND> targets are no longer no-ops as a result of 8.5.1.
+#
+# ## 8.5.1 (2025-02-18)
+#
+# ### Fixed
+#
+# - PHONY declaration for topic/<KIND> targets.
+#
+# ## 8.5.0 (2025-02-13)
+#
+# ### Added
+#
+# - make topic/<KIND> TOPIC_PATH=<PATH> target to create a new topic from the Writers' Toolkit templates.
+#
 # ## 8.4.0 (2025-01-27)
 #
 # ### Fixed