Merge bitcoin#25307: doc: fix typo in kernel/context.h and add desig to ignore-words

d575413 doc: add `desig` to ignore-words (brunoerg)
c06cc41 doc: fix typo in kernel/context.h (brunoerg)

Pull request description:

  This PR fixes a typo in `kernel/context.h` (libary => library) and add `desig` to ignore-words since it's a valid word, see:
  https://github.com/bitcoin/bitcoin/blob/b9416c3847cd347238a9d75d949327f69e187d79/src/net.cpp#L1105-L1117

ACKs for top commit:
  fanquake:
    ACK d575413

Tree-SHA512: 2d548c737b8184d0243445c7503f3f68256ecb0970bd834d52de099de3cd8c8b9c140e2b77d55e2542fbd45b1d21cbdee639f5b2ef8138c37b8b72e5211029c3

Author: fanquake

test/lint/spelling.ignore-words.txt

@@ -4,6 +4,7 @@ blockin
 cachable
 creat
 crypted
+desig
 fo
 fpr
 hights