Fortran: Fix module dependency scanning with upper-case SUBMODULE
The lexical token expression added by commit b5ac8b8a has a typo and does not match upper-case B in SUBMODULE. Fix it.
Fixes: #18595 (closed)
The lexical token expression added by commit b5ac8b8a has a typo and does not match upper-case B in SUBMODULE. Fix it.
Fixes: #18595 (closed)