GHA: rename config files to match pyspelling

To make it more obvious what needs to be looked at when pyspelling is
reporting an issue.

Follow-up to 95e50ad694 #18756
Closes #18974

.github/scripts/pyspelling.yaml

@@ -0,0 +1,33 @@
+# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# SPDX-License-Identifier: curl
+#
+# Docs: https://facelessuser.github.io/pyspelling/configuration/
+# Docs: https://github.com/UnicornGlobal/spellcheck-github-actions
+matrix:
+  - name: Markdown
+    expect_match: false
+    apsell:
+      mode: en
+    dictionary:
+      wordlists:
+        - wordlist.txt
+      output: wordlist.dic
+      encoding: utf-8
+    pipeline:
+      - pyspelling.filters.markdown:
+          markdown_extensions:
+            - markdown.extensions.extra:
+      - pyspelling.filters.html:
+          comments: true
+          attributes:
+            - title
+            - alt
+          ignores:
+            - ':matches(code, pre)'
+            - 'code'
+            - 'pre'
+            - 'strong'
+            - 'em'
+    sources:
+      - '**/*.md|!docs/BINDINGS.md|!docs/DISTROS.md|!docs/CIPHERS-TLS12.md|!docs/wcurl.md'