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/codespell.sh

@@ -9,7 +9,7 @@ cd "$(dirname "${0}")"/../..
 
 # shellcheck disable=SC2046
 codespell \
-  --skip '.github/scripts/spellcheck.words' \
+  --skip '.github/scripts/pyspelling.words' \
   --skip '.github/scripts/typos.toml' \
   --skip 'docs/THANKS' \
   --skip 'packages/*' \

.github/scripts/spacecheck.pl

@@ -53,7 +53,7 @@ my @non_ascii_allowed = (
 my $non_ascii_allowed = join(', ', @non_ascii_allowed);
 
 my @non_ascii = (
-    ".github/scripts/spellcheck.words",
+    ".github/scripts/pyspelling.words",
     ".mailmap",
     "RELEASE-NOTES",
     "docs/BINDINGS.md",

.github/scripts/typos.toml

@@ -22,7 +22,7 @@ extend-ignore-re = [
 [files]
 extend-exclude = [
   ".github/scripts/codespell-ignore.words",
-  ".github/scripts/spellcheck.words",
+  ".github/scripts/pyspelling.words",
   "docs/THANKS",
   "packages/*",
   "projects/Windows/tmpl/curl.vcxproj",