[docs] fix references in flux pipelines. (#11857)

* fix references in flux.

* Update src/diffusers/pipelines/flux/pipeline_flux_kontext.py
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

---------
Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>

src/diffusers/pipelines/flux/pipeline_flux_control.py

@@ -163,9 +163,9 @@ class FluxControlPipeline(
     TextualInversionLoaderMixin,
 ):
     r"""
-    The Flux pipeline for controllable text-to-image generation.
+    The Flux pipeline for controllable text-to-image generation with image conditions.
 
-    Reference: https://blackforestlabs.ai/announcing-black-forest-labs/
+    Reference: https://bfl.ai/flux-1-tools
 
     Args:
         transformer ([`FluxTransformer2DModel`]):

src/diffusers/pipelines/flux/pipeline_flux_kontext.py

@@ -195,9 +195,9 @@ class FluxKontextPipeline(
     FluxIPAdapterMixin,
 ):
     r"""
-    The Flux Kontext pipeline for text-to-image generation.
+    The Flux Kontext pipeline for image-to-image and text-to-image generation.
 
-    Reference: https://blackforestlabs.ai/announcing-black-forest-labs/
+    Reference: https://bfl.ai/announcements/flux-1-kontext-dev
 
     Args:
         transformer ([`FluxTransformer2DModel`]):