chore: add missing backquotes (#10180)

### Description

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add missing backquotes

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Signed-off-by: jimmycathy <[email protected]>

Author: jimmycathy

crates/turborepo-dirs/src/lib.rs

@@ -20,7 +20,7 @@ pub fn config_dir() -> Result<Option<AbsoluteSystemPathBuf>, PathError> {
 /// Returns the path to the user's configuration directory.
 ///
 /// This is a wrapper around `dirs_next::config_dir` that also checks the
-///  VERCEL_CONFIG_DIR_PATH` environment variable. If the environment variable
+///  `VERCEL_CONFIG_DIR_PATH` environment variable. If the environment variable
 /// is set, it will return that path instead of `dirs_next::config_dir`.
 pub fn vercel_config_dir() -> Result<Option<AbsoluteSystemPathBuf>, PathError> {
     if let Ok(dir) = std::env::var("VERCEL_CONFIG_DIR_PATH") {