docs: Update benchmarks

Why are they so much slower than the previous benchmarks? No clue. I went back
and ran the benchmarks on the 0.2.0 release and the values are approximately
what were seeing now, and Im not keen on improving the performance of the
existing parser until we switch parsing libraries (which will be a breaking
change)

Author: CosmicHorrorDev

BENCHMARKS.md

@@ -22,10 +22,10 @@ project directory
 
 ```text
 parser     fastest       │ slowest       │ median        │ mean          │ samples
-├─ parse   110.8 µs      │ 202.3 µs      │ 112.3 µs      │ 113.5 µs      │ 1759
-│          180.2 MB/s    │ 98.74 MB/s    │ 177.8 MB/s    │ 175.9 MB/s    │
-╰─ render  113.8 µs      │ 161.7 µs      │ 116.9 µs      │ 117.3 µs      │ 1702
-           167.1 MB/s    │ 117.6 MB/s    │ 162.6 MB/s    │ 162.2 MB/s    │
+├─ parse   487.7 µs      │ 991.3 µs      │ 565.6 µs      │ 570.2 µs      │ 5261
+│          40.96 MB/s    │ 20.15 MB/s    │ 35.32 MB/s    │ 35.04 MB/s    │
+╰─ render  79.09 µs      │ 215.8 µs      │ 84.52 µs      │ 85.43 µs      │ 35053
+           240.5 MB/s    │ 88.15 MB/s    │ 225.1 MB/s    │ 222.7 MB/s    │
 ```
 
 ## `keyvalues-serde`
@@ -44,15 +44,15 @@ while have a pretty minimal impact compared to the naïve approach_
 ```text
 ser_de                    fastest       │ slowest       │ median        │ mean          │ samples
 ├─ deserialize                          │               │               │               │
-│  ├─ FullStructBorrowed  210.6 µs      │ 400.5 µs      │ 216.5 µs      │ 218.1 µs      │ 910
-│  │                      94.85 MB/s    │ 49.88 MB/s    │ 92.28 MB/s    │ 91.57 MB/s    │
-│  ├─ FullStructOwned     214.4 µs      │ 255.7 µs      │ 218.7 µs      │ 220 µs        │ 898
-│  │                      93.16 MB/s    │ 78.11 MB/s    │ 91.33 MB/s    │ 90.81 MB/s    │
-│  ╰─ SingleField         200.9 µs      │ 240.5 µs      │ 206.7 µs      │ 207.5 µs      │ 963
-│                         99.44 MB/s    │ 83.07 MB/s    │ 96.64 MB/s    │ 96.28 MB/s    │
+│  ├─ FullStructBorrowed  558.4 µs      │ 993.2 µs      │ 623.6 µs      │ 625.1 µs      │ 4790
+│  │                      35.78 MB/s    │ 20.11 MB/s    │ 32.03 MB/s    │ 31.96 MB/s    │
+│  ├─ FullStructOwned     610.7 µs      │ 991.9 µs      │ 629.9 µs      │ 632.3 µs      │ 4726
+│  │                      32.71 MB/s    │ 20.14 MB/s    │ 31.72 MB/s    │ 31.59 MB/s    │
+│  ╰─ SingleField         598.4 µs      │ 1.144 ms      │ 621.2 µs      │ 622.8 µs      │ 4816
+│                         33.38 MB/s    │ 17.45 MB/s    │ 32.16 MB/s    │ 32.07 MB/s    │
 ╰─ serialize                            │               │               │               │
-   ├─ FullStructBorrowed  260.9 µs      │ 497.1 µs      │ 277.7 µs      │ 276.4 µs      │ 714
-   │                      72.85 MB/s    │ 38.24 MB/s    │ 68.45 MB/s    │ 68.76 MB/s    │
-   ╰─ FullStructOwned     263.4 µs      │ 298.7 µs      │ 279.3 µs      │ 277.7 µs      │ 711
-                          72.15 MB/s    │ 63.64 MB/s    │ 68.04 MB/s    │ 68.43 MB/s    │
+   ├─ FullStructBorrowed  183.9 µs      │ 1.128 ms      │ 194.7 µs      │ 202.3 µs      │ 14721
+   │                      103.3 MB/s    │ 16.84 MB/s    │ 97.63 MB/s    │ 93.96 MB/s    │
+   ╰─ FullStructOwned     176.7 µs      │ 505.2 µs      │ 193.3 µs      │ 194.5 µs      │ 15317
+                          107.5 MB/s    │ 37.62 MB/s    │ 98.32 MB/s    │ 97.73 MB/s    │
 ```