docs: update heading

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/math/base/special/tribonaccif/README.md

@@ -18,7 +18,7 @@ limitations under the License.
 
 -->
 
-# Tribonaccif
+# tribonaccif
 
 > Compute the nth [Tribonacci number][tribonacci-number] as a [single-precision floating-point number][ieee754].