Update CI environment

Author: facelessuser

.github/workflows/build.yml

@@ -99,7 +99,7 @@ jobs:
     # Results
     - name: Upload Results
       if: success()
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v3
       with:
         file: ./coverage.xml
         flags: unittests

tox.ini

@@ -8,10 +8,10 @@ passenv = LANG,TOX_SPELL_PATH,TOX_SPELL_REQUIRE,HOME
 deps=
     -rrequirements/tests.txt
 commands=
-    {envbindir}/py.test --cov pyspelling --cov-append {toxinidir}
-    {envbindir}/coverage html -d {envtmpdir}/coverage
-    {envbindir}/coverage xml
-    {envbindir}/coverage report --show-missing
+    {envpython} -m pytest --cov pyspelling --cov-append {toxinidir}
+    {envpython} -m coverage html -d {envtmpdir}/coverage
+    {envpython} -m coverage xml
+    {envpython} -m coverage report --show-missing
 
 [testenv:documents]
 deps=