Detect .git/modules/*/config as language git-config (#15295)

These files are config files for Git submodules

Author: kpbaks

languages.toml

@@ -2240,7 +2240,7 @@ source = { git = "https://github.com/tree-sitter/tree-sitter-regex", rev = "e1cf
 [[language]]
 name = "git-config"
 scope = "source.gitconfig"
-file-types = ["gitconfig", { glob = ".gitmodules" }, { glob = "gitconfig" }, { glob = ".gitconfig" }, { glob = ".git/config" }, { glob = ".config/git/config" }]
+file-types = ["gitconfig", { glob = ".gitmodules" }, { glob = "gitconfig" }, { glob = ".gitconfig" }, { glob = ".git/config" }, { glob = ".config/git/config" }, { glob = ".git/modules/*/config" }]
 injection-regex = "git-config"
 comment-token = "#"
 indent = { tab-width = 4, unit = "\t" }