docs: fix heading

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/constants/float16/exponent-bias/README.md

@@ -18,7 +18,7 @@ limitations under the License.
 
 -->
 
-# FLOAT32_EXPONENT_BIAS
+# FLOAT16_EXPONENT_BIAS
 
 > The bias of a [half-precision floating-point number's][half-precision-floating-point-format] exponent.