Fix version quotes for black

[blag]

GHA CI is failing because our release scripts insert single quotes instead of double quotes:

sed -i -e "s/\(__version__ = \).*/\1'${VERSION}'/" ${INIT_FILE}
#                                   ^          ^

But black forces us to use double quotes:

================== black-check ====================

# st2 components
===========================================================
Running black on st2actions
===========================================================
would reformat /home/runner/work/st2/st2/st2actions/st2actions/__init__.py
Oh no! 💥 💔 💥
1 file would be reformatted, 59 files would be left unchanged.
make: *** [Makefile:372: .black-check] Error 1
Script done, file is typescript
Error: Process completed with exit code 2.

Running black manually:

diff --git a/st2actions/st2actions/__init__.py b/st2actions/st2actions/__init__.py
index 2e5ec8277..18f4135fa 100644
--- a/st2actions/st2actions/__init__.py
+++ b/st2actions/st2actions/__init__.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.

-__version__ = '3.6dev'
+__version__ = "3.6dev"

This PR switches to using double quotes in all of the __init__.py files for the various packages in the codebase.

The corresponding PR to fix our release scripts is StackStorm/st2cd#464.

[amanda11]

LGTM

[arm4b]

Thanks! Back to green builds ✔️