Bump numpy from 1.21.5 to 1.22.0 in /docs (#91)

Bumps [numpy](https://github.com/numpy/numpy) from 1.21.5 to 1.22.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst)
- [Commits](numpy/numpy@v1.21.5...v1.22.0)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: indirect
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -9,7 +9,7 @@ alabaster==0.7.12
 babel==2.9.1
     # via sphinx
 boto3==1.20.47
-    # via -r docs/requirements.in
+    # via -r requirements.in
 botocore==1.23.47
     # via
     #   boto3
@@ -26,8 +26,6 @@ idna==3.3
     # via requests
 imagesize==1.3.0
     # via sphinx
-importlib-metadata==4.10.1
-    # via sphinx
 jinja2==3.0.3
     # via sphinx
 jmespath==0.10.0
@@ -36,12 +34,12 @@ jmespath==0.10.0
     #   botocore
 markupsafe==2.0.1
     # via jinja2
-numpy==1.21.5
+numpy==1.22.0
     # via pandas
 packaging==21.3
     # via sphinx
 pandas==1.3.5
-    # via -r docs/requirements.in
+    # via -r requirements.in
 pygments==2.11.2
     # via sphinx
 pyparsing==3.0.7
@@ -64,10 +62,10 @@ snowballstemmer==2.2.0
     # via sphinx
 sphinx==4.4.0
     # via
-    #   -r docs/requirements.in
+    #   -r requirements.in
     #   sphinx-rtd-theme
 sphinx-rtd-theme==1.0.0
-    # via -r docs/requirements.in
+    # via -r requirements.in
 sphinxcontrib-applehelp==1.0.2
     # via sphinx
 sphinxcontrib-devhelp==1.0.2
@@ -81,12 +79,8 @@ sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 typing-extensions==4.0.1
-    # via
-    #   -r docs/requirements.in
-    #   importlib-metadata
+    # via -r requirements.in
 urllib3==1.26.8
     # via
     #   botocore
     #   requests
-zipp==3.7.0
-    # via importlib-metadata