Bump notebook in /tensorflow_1_x/8_sentiment_network

Bumps [notebook](http://jupyter.org) from 6.4.10 to 6.4.12.

---
updated-dependencies:
- dependency-name: notebook
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tensorflow_1_x/8_sentiment_network/requirements.txt

@@ -19,7 +19,7 @@ MarkupSafe==1.0
 mistune==0.8.1
 nbconvert==5.1.1
 nbformat==4.3.0
-notebook==6.4.10
+notebook==6.4.12
 numpy==1.21.0
 packaging==16.8
 pandocfilters==1.4.1