Reduce rust-version to 1.71.1

Only a minor change is needed in order to support rustc 1.71.1.
Since this is the version of rust currently packaged by Debian
trixie, it is nice for distro packagers if that version
can be supported out of the box.

Cargo.toml

@@ -10,7 +10,7 @@ name = "vec1"
 readme = "./README.md"
 repository = "https://github.com/rustonaut/vec1/"
 edition = "2021"
-rust-version = "1.74"
+rust-version = "1.71.1"
 
 [features]
 default = ["std"]

src/lib.rs

@@ -756,7 +756,8 @@ where
         if N == 0 {
             Err(Size0Error)
         } else {
-            Ok(Self(value.into()))
+            // TODO: as_slice can be removed when MSRV is bumped to 1.74
+            Ok(Self(value.as_slice().into()))
         }
     }
 }
@@ -771,7 +772,8 @@ where
         if N == 0 {
             Err(Size0Error)
         } else {
-            Ok(Self(value.into()))
+            // TODO: as_slice can be removed when MSRV is bumped to 1.74
+            Ok(Self(value.as_slice().into()))
         }
     }
 }