workaround for UTF-8 character in 2001/ollinger/README.md

The file `2001/ollinger/README.md` contained a single lower case
small letter e with a acute mark as defined by the UTF-8 character
for the 2 bytes: 0xc3 0xa9.

Replaced the RAW UTF-8 character: "LATIN SMALL LETTER E WITH ACUTE"
with the HTML "é".  Not sure what the best way to handle this,
however.

This character crashed markdown tools such as _qlmarkdown_
AND it prevented GitHub from rendering the web site.  GitHub
reported in "Build with Jekyll":

```
Conversion error: Jekyll::Converters::Markdown encountered an error while converting '2001/ollinger/README.md':
847
                    The source text contains invalid characters for the used encoding UTF-8
848
/usr/local/bundle/gems/kramdown-2.3.2/lib/kramdown/parser/base.rb:93:in `adapt_source': The source text contains invalid characters for the used encoding UTF-8 (RuntimeError)
849
	from /usr/local/bundle/gems/kramdown-2.3.2/lib/kramdown/parser/kramdown.rb:90:in `parse'
850
	from /usr/local/bundle/gems/kramdown-parser-gfm-1.1.0/lib/kramdown/parser/gfm.rb:56:in `parse'
851
	from /usr/local/bundle/gems/kramdown-2.3.2/lib/kramdown/parser/base.rb:69:in `parse'
852
	from /usr/local/bundle/gems/kramdown-2.3.2/lib/kramdown/document.rb:102:in `initialize'
853
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/converters/markdown/kramdown_parser.rb:42:in `new'
854
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/converters/markdown/kramdown_parser.rb:42:in `convert'
855
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/converters/markdown.rb:77:in `convert'
856
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/renderer.rb:101:in `block in convert'
857
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/renderer.rb:99:in `each'
858
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/renderer.rb:99:in `reduce'
859
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/renderer.rb:99:in `convert'
860
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/renderer.rb:83:in `render_document'
861
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/renderer.rb:62:in `run'
862
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/site.rb:479:in `render_regenerated'
863
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/site.rb:472:in `block in render_pages'
864
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/site.rb:471:in `each'
865
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/site.rb:471:in `render_pages'
866
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/site.rb:192:in `render'
867
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/site.rb:71:in `process'
868
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/command.rb:28:in `process_site'
869
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/commands/build.rb:65:in `build'
870
	from /usr/local/bundle/gems/jekyll-3.9.3/lib/jekyll/commands/build.rb:36:in `process'
871
	from /usr/local/bundle/gems/github-pages-228/bin/github-pages:70:in `block (3 levels) in <top (required)>'
872
	from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `block in execute'
873
	from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `each'
874
	from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `execute'
875
	from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/program.rb:42:in `go'
876
	from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary.rb:19:in `program'
877
	from /usr/local/bundle/gems/github-pages-228/bin/github-pages:6:in `<top (required)>'
878
	from /usr/local/bundle/bin/github-pages:23:in `load'
879
	from /usr/local/bundle/bin/github-pages:23:in `<main>'
```

2001/ollinger/README.md

@@ -3,7 +3,7 @@ Best primal ASCII graphics:
     Nicolas Ollinger
     Ecole Normale Superieure de Lyon
     LIP, ENS Lyon
-    46, allée d'Italie
+    46, allée d'Italie
     69364 Lyon Cedex 07
     France