Fix:

> Building for syslog-ng-3.20.1

gmake[2]: Entering directory '/export/wrkdir/amd64/usr/ports/sysutils/
syslog-ng/work/syslog-ng-3.20.1'
Makefile:22291: *** "Python interpreter is required to generate grammar
files, but it was not detected during configure". Stop.
gmake[2]: Leaving directory '/export/wrkdir/amd64/usr/ports/sysutils/
syslog-ng/work/syslog-ng-3.20.1'

• Error code 1

Stop.
make[1]: stopped in /usr/ports/sysutils/syslog-ng

• Error code 1

Stop.
make: stopped in /usr/ports/sysutils/syslog-ng

Broken by PR: 236845