doc: make openssl maintenance position independent
It used to have some cd
commands that if done literally would
invalidate the subsequent commands. Modify them to be more accurate,
which also simplifies pasting them directly into the console from the
guide while doing an update.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
cc: @hassaanp