add FixedIntervalSMoother to API ref

vegard-solum-4ss · vegard-solum-4ss · commit c621a6d7c883 · 2025-06-12T08:47:38.000+02:00
diff --git a/docs/reference/index.rst b/docs/reference/index.rst
@@ -12,6 +12,7 @@ API reference
 
    AHRS
    AidedINS
+   FixedIntervalSmoother
    StrapdownINS
    VRU
    gravity
