Enable strict mode 6.11 in qtspeech


Fixes: QTBUG-145302
Pick-to: 6.11
Change-Id: I1d6481bb05b68212fcc12e18f348c03f4f2ca451
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
commit706a1da34308908f53373959f50c8437a53acf48
parent35ca6878db5c7c42f90b16b07729a9fae4220f2a
authorMarc Mutz <marc.mutz@qt.io>
committerMarc Mutz <marc.mutz@qt.io>
commit timeWed, 8 Apr 2026 14:06:25 +0100