Adjust codespell file exclusions to support projects containing multiple Go modules

The "codespell" tool is used to check for the presence of commonly misspelled words in the project files. Since we don't
have control over their content, automatically generated files should be excluded from such checks for efficiency and to
avoid false positives. This includes the `go.mod` and `go.sum` Go module metadata files.

Projects may contain multiple Go modules in subfolders of the repository, each with their own metadata files.

Previously, the codespell configuration only excluded `go.mod` and `go.sum` in the root of the repository.

Author: per1234

.codespellrc

@@ -3,7 +3,7 @@
 [codespell]
 # In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
 ignore-words-list = ,
-skip = ./.git,./.licenses,__pycache__,node_modules,./go.mod,./go.sum,./package-lock.json,./poetry.lock,./yarn.lock
+skip = ./.git,./.licenses,__pycache__,go.mod,go.sum,node_modules,./package-lock.json,./poetry.lock,./yarn.lock
 builtin = clear,informal,en-GB_to_en-US
 check-filenames =
 check-hidden =