TT #205 · Parshas Tazria · Aliyah 5 · Passuk 33
English: he shall shave himself, but he shall not shave the netek; and the priest shall isolate the netek for a second seven-day period.
Chabad.org — Chumash, English translation + Rashi for Vayikra 13:33
Torah Temimah cites Sifra (Toras Kohanim) for the scope of the shaving rule, including a nazirite.
Sifra — Vayikra 13, Midrash Sefer
English: “He shall shave”—the rule applies to everyone and includes shaving with any implement; it applies even to a nazirite.
Textual derivation
The shaving rule applies broadly across people and implements, and the Sifra explicitly includes a nazirite.