fix some 404 (and adds alias precautionous)

content/equipment/radio-stuff/accessories/_index.md

@@ -3,6 +3,8 @@ title: Accessories
 summary: >
   Additional equipment like antenna tuners, bags,
   masts, coax cables...
+aliases:
+  - /equipment/accessories/
 #date: 2019-11-01
 #tags:
 #- accessory

content/equipment/radio-stuff/antennas/_index.md

@@ -3,6 +3,8 @@ title: Antennas
 summary: >
   I have no idea what antenna you should use. These are the
   antennas that I use (or used).
+aliases:
+  - /equipment/antennas/
 #date: 2019-11-01
 #tags:
 #- antenna

content/equipment/radio-stuff/transceivers/_index.md

@@ -2,7 +2,7 @@
 title: Transceivers
 summary: The big ones. May contain QRP transceivers.
 aliases:
-  - /equipment/transceiver/
+  - /equipment/transceivers/
 #date: 2022-11-16T22:19:11+01:00
 #tags:
 #- transceiver