doc: fix typo in BUILDING.md

PR-URL: #35807
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: RaisinTen

BUILDING.md

@@ -399,7 +399,7 @@ to execute JavaScript tests independently of the C++ test suite:
 $ make coverage-run-js
 ```
 
-If you are updating tests and want to collect coverrage for a single test file
+If you are updating tests and want to collect coverage for a single test file
 (e.g. `test/parallel/test-stream2-transform.js`):
 
 ```text