[PATCH 5/6] doc/rel_notes: fix style of API changes section

[Bruce Richardson <bruce.richardson@intel.com>]

The format of the API section as documented does not have headings in
bold. This simpler format is also what is used for the 25.11 and
previous release notes. Update text for 26.07 to match the documented
and previously used style.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 doc/guides/rel_notes/release_26_07.rst | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/doc/guides/rel_notes/release_26_07.rst b/doc/guides/rel_notes/release_26_07.rst
index b3c23b73a1..fca135569f 100644
--- a/doc/guides/rel_notes/release_26_07.rst
+++ b/doc/guides/rel_notes/release_26_07.rst
@@ -317,13 +317,9 @@ API Changes
    Also, make sure to start the actual text at the margin.
    =======================================================
 
-* **eal: promoted timing-safe memory comparison from experimental to stable.**
+* eal: Promoted ``rte_memeq_timingsafe()`` from experimental to stable.
 
-  The inline function ``rte_memeq_timingsafe()`` is no longer marked experimental.
-
-* **ethdev: promoted flow metadata API from experimental to stable.**
-
-  The following ethdev symbols are no longer marked experimental:
+* ethdev: Promoted the following flow metadata symbols from experimental to stable:
 
   - ``rte_flow_dynf_metadata_register``
   - ``rte_flow_dynf_metadata_offs``
@@ -332,16 +328,15 @@ API Changes
   - ``rte_flow_dynf_metadata_get``
   - ``rte_flow_dynf_metadata_set``
 
-* **mlx5: promoted driver event and steering management APIs from experimental to stable.**
-
-  The following mlx5 functions are no longer marked experimental:
+* mlx5: Promoted the following driver event and steering management functions
+  from experimental to stable:
 
   - ``rte_pmd_mlx5_driver_event_cb_register``
   - ``rte_pmd_mlx5_driver_event_cb_unregister``
   - ``rte_pmd_mlx5_enable_steering``
   - ``rte_pmd_mlx5_disable_steering``
 
-* **ip_frag: changed handling of malformed fragments.**
+* ip_frag: Changed handling of malformed fragments.
 
   - Duplicate fragments are tolerated instead of failing reassembly.
   - Overlapping fragments are rejected on arrival rather than during reassembly.
-- 
2.53.0