build: revert to OpenSSL 3.1

OpenSSL 3.2 build currently fails under Nix
so we cannot build deltachat-rpc-server releases:
<https://github.com/alexcrichton/openssl-src-rs/issues/235>

Cargo.lock

@@ -1124,6 +1124,7 @@ dependencies = [
  "num-traits",
  "num_cpus",
  "once_cell",
+ "openssl-src",
  "parking_lot",
  "percent-encoding",
  "pgp",
@@ -3211,9 +3212,9 @@ checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
 [[package]]
 name = "openssl"
-version = "0.10.64"
+version = "0.10.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95a0481286a310808298130d22dd1fef0fa571e05a8f44ec801801e84b216b1f"
+checksum = "15c9d69dd87a29568d4d017cfe8ec518706046a05184e5aea92d0af890b803c8"
 dependencies = [
  "bitflags 2.4.2",
  "cfg-if",
@@ -3243,18 +3244,18 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
 [[package]]
 name = "openssl-src"
-version = "300.2.3+3.2.1"
+version = "300.1.6+3.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cff92b6f71555b61bb9315f7c64da3ca43d87531622120fea0195fc761b4843"
+checksum = "439fac53e092cd7442a3660c85dde4643ab3b5bd39040912388dcdabf6b88085"
 dependencies = [
  "cc",
 ]
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.101"
+version = "0.9.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dda2b0f344e78efc2facf7d195d098df0dd72151b26ab98da807afc26c198dff"
+checksum = "22e1bf214306098e4832460f797824c05d25aacdf896f64a985fb0fd992454ae"
 dependencies = [
  "cc",
  "libc",