Fix changelog entries using strings for sections.

changelogs/fragments/azure_rm_appgateway-probe.yaml

@@ -1,2 +1,2 @@
 minor_changes:
-  azure_rm_appgateway - add redirect configurations and probes
+  - azure_rm_appgateway - add redirect configurations and probes

changelogs/fragments/standardize_connection_vars.yaml

@@ -1,7 +1,7 @@
-minor_changes: |
+minor_changes:
-  Connection plugins have been standardized to allow use of ``ansible_<conn-type>_user``
+  - Connection plugins have been standardized to allow use of ``ansible_<conn-type>_user``
-  and ``ansible_<conn-type>_password`` variables.  Variables such as
+    and ``ansible_<conn-type>_password`` variables.  Variables such as
-  ``ansible_<conn-type>_pass`` and ``ansible_<conn-type>_username`` are treated
+    ``ansible_<conn-type>_pass`` and ``ansible_<conn-type>_username`` are treated
-  with lower priority than the standardized names and may be deprecated in the
+    with lower priority than the standardized names and may be deprecated in the
-  future.  In general, the ``ansible_user`` and ``ansible_password`` vars should
+    future.  In general, the ``ansible_user`` and ``ansible_password`` vars should
-  be used unless there is a reason to use the connection-specific variables.
+    be used unless there is a reason to use the connection-specific variables.