convert.py, markdown: Fix right single quotation mark.

Some generated markdown have right single quotation marks, and without
this fix, it ends up being displayed as '???' in the generated HTML
files.

As an example with site/new-replicant-test-images-available.html we
have:
    We are please to remind you that, as usual, Replicant is fully
    free software and doesn???t include any proprietary firmwares.

Converting the right single quotation marks to apostrophes fixed it.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/markdown/2019_07_graphics-support-for-replicant-9.md b/markdown/2019_07_graphics-support-for-replicant-9.md
index 8d2d97e..1d7fcc0 100644
--- a/markdown/2019_07_graphics-support-for-replicant-9.md
+++ b/markdown/2019_07_graphics-support-for-replicant-9.md
@@ -16,7 +16,7 @@ previously on LKML][1]. The devfreq module was also disabled as a workaround
 for graphics corruption issue that happened due to too low clock speeds. Mesa
 on the other hand required us to whitelist Exynos DRM driver to be used with a
 software rendering driver called kms_swrast. After these tiny changes we were
-already able to use the Mesa’s software rendering backend called softpipe!
+already able to use the Mesa's software rendering backend called softpipe!
 Unfortunately, softpipe turned out to be unusably slow even after using HW
 overlay planes to offload some of the buffer compositions to the Exynos 4412
 display controller found on the Samsung Galaxy S3.