Stabler Solari world cache (#20980)

# Objective

- Make the world cache a little more stable, with less random "blooming"
of light.

## Solution

- Use a slower blending rate for world cache updates. This increases
stability, at the cost of making the world cache slower to react to
changes in the scene.

## Testing
- Ran the solari example before and after, and observed less artifacts.

Author: JMS55

crates/bevy_solari/src/realtime/world_cache_query.wgsl

@@ -1,7 +1,7 @@
 #define_import_path bevy_solari::world_cache
 
 /// How responsive the world cache is to changes in lighting (higher is less responsive, lower is more responsive)
-const WORLD_CACHE_MAX_TEMPORAL_SAMPLES: f32 = 10.0;
+const WORLD_CACHE_MAX_TEMPORAL_SAMPLES: f32 = 20.0;
 /// Maximum amount of frames a cell can live for without being queried
 const WORLD_CACHE_CELL_LIFETIME: u32 = 30u;
 /// Maximum amount of attempts to find a cache entry after a hash collision

release-content/release-notes/bevy_solari.md

@@ -1,7 +1,7 @@
 ---
 title: Initial raytraced lighting progress (bevy_solari)
 authors: ["@JMS55", "@SparkyPotato"]
-pull_requests: [19058, 19620, 19790, 20020, 20113, 20156, 20213, 20242, 20259, 20406, 20457, 20580, 20596, 20622, 20658, 20659]
+pull_requests: [19058, 19620, 19790, 20020, 20113, 20156, 20213, 20242, 20259, 20406, 20457, 20580, 20596, 20622, 20658, 20659, 20980]
 ---
 
 ## Overview