Bump sphinxcontrib-towncrier (#478)

##### SUMMARY
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<!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
Replaces #464

Author: Qalthos

docs/requirements.txt

@@ -246,9 +246,9 @@ sphinxcontrib-serializinghtml==1.1.5 \
     --hash=sha256:352a9a00ae864471d3a7ead8d7d79f5fc0b57e8b3f95e9867eb9eb28999b92fd \
     --hash=sha256:aa5f6de5dfdf809ef505c4895e51ef5c9eac17d0f287933eb49ec495280b6952
     # via sphinx
-sphinxcontrib-towncrier==0.3.1a3 \
-    --hash=sha256:7d521a435c06b39d519ce0c9c1495a9e5f0e7db7fd243674ee4a16ac1ce1812e \
-    --hash=sha256:eedf44b0e31f0bc7cc1dc0f608f9e84fb8a7aa775f5b3c89ce17bca062f12048
+sphinxcontrib-towncrier==0.3.2a0 \
+    --hash=sha256:74fc27a24231b56f1e4820a5dcb121a8c69aa6b6a0d2367c61144b9673ebf73a \
+    --hash=sha256:7cf18ac9c13533fffdb794dab278c6ad845f8c85bfa56942eba077d543885fa6
     # via -r docs/requirements.in
 tomli==1.2.2 \
     --hash=sha256:c6ce0015eb38820eaf32b5db832dbc26deb3dd427bd5f6556cf0acac2c214fee \