fixing bearssl version in lockfile and in nimble file

It seems lockfile was generated wrong or not updated,
broken in 76bff752a2

setting it to version used in nimbus build system based build

Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>

libp2pdht.nimble

@@ -10,7 +10,7 @@ skipDirs      = @["tests"]
 # Dependencies
 requires "nim >= 1.2.0",
          "nimcrypto >= 0.5.4 & < 0.6.0",
-         "bearssl#head",
+         "bearssl#f4c4233de453cb7eac0ce3f3ffad6496295f83ab",
          "chronicles >= 0.10.2 & < 0.11.0",
          "chronos >= 3.0.11 & < 3.1.0",
          "libp2p#unstable",

nimble.lock

@@ -23,14 +23,14 @@
     },
     "bearssl": {
       "version": "0.1.5",
-      "vcsRevision": "ba80e2a0d7ae8aab666cee013e38ff8d33a3e5e7",
+      "vcsRevision": "f4c4233de453cb7eac0ce3f3ffad6496295f83ab",
       "url": "https://github.com/status-im/nim-bearssl",
       "downloadMethod": "git",
       "dependencies": [
         "unittest2"
       ],
       "checksums": {
-        "sha1": "383abd5becc77bf8e365b780a29d20529e1d9c4c"
+        "sha1": "dabf4aaac8969fb10281ebd9ff51875d37eeaaa9"
       }
     },
     "httputils": {