Fixed link to external dependencies (#37581)

Author: rashidrafeek

doc/build/linux.md

@@ -4,7 +4,7 @@
 * To use external shared libraries not in the system library search path, set `USE_SYSTEM_XXX=1` and `LDFLAGS=-Wl,-rpath,/path/to/dir/contains/libXXX.so` in `Make.user`.
 * Instead of setting `LDFLAGS`, putting the library directory into the environment variable `LD_LIBRARY_PATH` (at both compile and run time) also works.
 * The `USE_SYSTEM_*` flags should be used with caution. These are meant only for troubleshooting, porting, and packaging, where package maintainers work closely with the Julia developers to make sure that Julia is built correctly. Production use cases should use the officially provided binaries. Issues arising from the use of these flags will generally not be accepted.
-* See also the [external dependencies](#required-build-tools-and-external-libraries).
+* See also the [external dependencies](build.md#required-build-tools-and-external-libraries).
 
 ### Architecture Customization