fix typo (#1217)

diff --git a/src/rp2_common/pico_rand/include/pico/rand.h b/src/rp2_common/pico_rand/include/pico/rand.h
index 8f8211f..356c7ce 100644
--- a/src/rp2_common/pico_rand/include/pico/rand.h
+++ b/src/rp2_common/pico_rand/include/pico/rand.h
@@ -55,7 +55,7 @@
  * With default settings, the seed generation takes approximately 1 millisecond while
  * subsequent random numbers generally take between 10 and 20 microseconds to generate.
  *
- * pico_rand methods may be safely called from either core or from an IRQ, but be careful in the latter case as the
+ * pico_rand methods may be safely called from either core or from an IRQ, but be careful in the latter case as
  * the calls may block for a number of microseconds waiting on more entropy.
  */