Update codespell integration and fix reported issues (#599)

* Update codespell integration and fix reported issues

* Update .codespellrc

---------

Co-authored-by: James Mitchell <james-d-mitchell@users.noreply.github.com>

.codespellrc

@@ -1,3 +1,3 @@
 [codespell]
 skip = ./.git,./tmp,./data,./extern,./tst,./bin,./libtool,configure,configure~,./gh-pages,./autom4te.cache,./cnf,aclocal.m4,./m4,./doc/*.log,./doc/*.html,./doc/*.txt,./doc/*.six,./doc/*.js,./doc/*.bbl,./doc/*.tex,./doc/*.bib
-ignore-words-list=ist,MIS,mis
+ignore-words-list=ist,manuel,MIS,mis

.github/workflows/codespell.yml

@@ -10,5 +10,5 @@ jobs:
   codespell:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: codespell-project/actions-codespell@v1.0
+    - uses: actions/checkout@v4
+    - uses: codespell-project/actions-codespell@v2

doc/z-chap9.xml

@@ -50,7 +50,7 @@
       <Item>
 	<E>DiSparse6</E> is a new format based on <E> Sparse6 </E>, but
 	designed for digraphs. In this format the list of edges is
-	partitioned into inceasing and decreasing edges, depending whether the
+	partitioned into increasing and decreasing edges, depending whether the
 	edge has its source bigger than the range. Then both sets of edges are
 	written separately in <E> Sparse6 </E> format with a separation symbol
 	in between.