devel/cmake: Fix dependency

Fix:

> cmake-3.28.2 depends on file: /usr/local/man/man1/cmake.1.gz - not found

> Installing existing package /packages/All/cmake-man-3.28.2.pkg

[kq64] Installing cmake-man-3.28.2...
[kq64] Extracting cmake-man-3.28.2: .......... done

> cmake-3.28.2 depends on file: /usr/local/man/man1/cmake.1.gz - not found

• Error code 1

Stop.
make: stopped in /usr/ports/devel/cmake

>> Cleaning up wrkdir

> Cleaning for cmake-3.28.2

Approved by: portmgr (implicit, just fix it)