Cosmetic fix

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/ChangeLog.d/rsa-bitlen.txt b/ChangeLog.d/rsa-bitlen.txt
index 9f0b324..bcd185f 100644
--- a/ChangeLog.d/rsa-bitlen.txt
+++ b/ChangeLog.d/rsa-bitlen.txt
@@ -1,6 +1,6 @@
 Bugfix
    * Fix mbedtls_pk_get_bitlen() for RSA keys whose size is not a
-     multiple  of 8. Fixes #868.
+     multiple of 8. Fixes #868.
 
 Features
    * The new function mbedtls_rsa_get_bitlen() returns the length of the modulus