chore: Update rust-toolchain to 1.66 for testing

Note that tests will not compile due to the silent MSRV bump in `blake2b_simd`. Hence, we need to use `1.66` as toolchain. Resolves: #207
privacy-scaling-explorations · Sep 16, 2023 · aae844f · aae844f
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commit aae844f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/rust-toolchain b/rust-toolchain
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-1.65.0
+1.66.0