Pin Charmed Operator Framework version for charms

Change-Id: Iff5659151e5678298b72e54b7b22a375bc7b7ebf
Signed-off-by: Dario Faccin <dario.faccin@canonical.com>
(cherry picked from commit d0303f5fff9c744aa101767166e94277c9e3259f)
diff --git a/installers/charm/vca-integrator-operator/tox.ini b/installers/charm/vca-integrator-operator/tox.ini
index 605d690..e063dd4 100644
--- a/installers/charm/vca-integrator-operator/tox.ini
+++ b/installers/charm/vca-integrator-operator/tox.ini
@@ -62,7 +62,7 @@
     -r{toxinidir}/requirements.txt
 commands =
     codespell {[vars]lib_path}
-    codespell {toxinidir}/. --skip {toxinidir}/.git --skip {toxinidir}/.tox \
+    codespell {toxinidir} --skip {toxinidir}/.git --skip {toxinidir}/.tox \
       --skip {toxinidir}/build --skip {toxinidir}/lib --skip {toxinidir}/venv \
       --skip {toxinidir}/.mypy_cache --skip {toxinidir}/icon.svg
     pylint -E {[vars]src_path}