Downgrade csscolorparser to fix MSRV

Cargo.lock

@@ -894,9 +894,9 @@ dependencies = [
 
 [[package]]
 name = "csscolorparser"
-version = "0.8.2"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64a878cfd6075649977f548ed439564cfdbe1f190a6656a00b48af7740f2f148"
+checksum = "02ee6eae4d99456f92dc379ba21cf08f783ef5525f193c3854b4e921ece045c5"
 dependencies = [
  "num-traits",
  "phf",

niri-config/Cargo.toml

@@ -9,7 +9,8 @@ repository.workspace = true
 
 [dependencies]
 bitflags.workspace = true
-csscolorparser = "0.8.2"
+# 0.8.2 is incompatible with our MSRV 1.85.0
+csscolorparser = "=0.8.1"
 knuffel = "3.2.0"
 miette = { version = "5.10.0", features = ["fancy-no-backtrace"] }
 niri-ipc = { version = "25.11.0", path = "../niri-ipc" }