Bump virtualenv from 21.5.1 to 21.7.13 in /CI (#714)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 21.5.1 to 21.7.13.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@21.5.1...21.7.13)

---
updated-dependencies:
- dependency-name: virtualenv
  dependency-version: 21.7.13
  dependency-type: indirect
...

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

Author: dependabot[bot]

CI/requirements_ci.txt

@@ -7,7 +7,7 @@
 build==1.5.0 \
     --hash=sha256:13f3eecb844759ab66efec90ca17639bbf14dc06cb2fdf37a9010322d9c50a6f \
     --hash=sha256:302c22c3ba2a0fd5f3911918651341ebb3896176cbdec15bd421f80b1afc7647
-    # via -r CI/requirements_ci.in
+    # via -r requirements_ci.in
 cachetools==7.1.4 \
     --hash=sha256:323dc4127934744db5b54eb4924482d7edafbf9554e820d1531c2e08c0e4ef54 \
     --hash=sha256:437f55a4e0c1b01a4f3077cc470e6991d47430970e36fbcb77e2be0df4fc1cd6
@@ -38,7 +38,6 @@ platformdirs==4.10.0 \
     --hash=sha256:31e761a6a0ca04faf7353ea759bdba55652be214725111e5aac52dfa29d4bef7 \
     --hash=sha256:fb516cdb12eb0d857d0cd85a7c57cea4d060bee4578d6cf5a14dfdf8cbf8784a
     # via
-    #   python-discovery
     #   tox
     #   virtualenv
 pluggy==1.6.0 \
@@ -53,9 +52,9 @@ pyproject-hooks==1.2.0 \
     --hash=sha256:1e859bd5c40fae9448642dd871adf459e5e2084186e8d2c2a79a824c970da1f8 \
     --hash=sha256:9e5c6bfa8dcc30091c74b0cf803c81fdd29d94f01992a7707bc97babb1141913
     # via build
-python-discovery==1.4.2 \
-    --hash=sha256:475803f53b7b2ed6e490e27373f9d8340f7d2eebf9acdaf645d7d714c97bb500 \
-    --hash=sha256:8f3746c4b4968d22afbb97d36e1a0e5b66e6c0f297290f2e95f05b9b8bf18690
+python-discovery==1.6.1 \
+    --hash=sha256:cf87d3627dfb4412437fdd5b13eae402607722998d21567993aedbc59b23c15e \
+    --hash=sha256:d43fcdef879fe795352bd13ccf8d185ba5a9f86f36cfcd00529f596e737442b3
     # via
     #   tox
     #   virtualenv
@@ -119,19 +118,19 @@ tox==4.56.1 \
     --hash=sha256:4d06b925c4dd67872099b39c5a46fba79a2169c5f6e32060f95a8b1181f0ef55 \
     --hash=sha256:db1c2610802553189cf40de251661d066a635ee0ed9bf2a60093b5f1a7f36ef8
     # via
-    #   -r CI/requirements_ci.in
+    #   -r requirements_ci.in
     #   tox-gh
 tox-gh==1.7.1 \
     --hash=sha256:4f4871ee4091b41464f2df9ab1fcedb14a48accdecbb60d53297301a9d8984c6 \
     --hash=sha256:a82285b16a597516f9a24f20326b124ddc7924a8b70cb05a9192e1c53d7f701d
-    # via -r CI/requirements_ci.in
+    # via -r requirements_ci.in
 typing-extensions==4.15.0 \
     --hash=sha256:0cea48d173cc12fa28ecabc3b837ea3cf6f38c6d1136f85cbaaf598984861466 \
     --hash=sha256:f0fa19c6845758ab08074a0cfa8b7aecb71c999ca73d62883bc25cc018c4e548
     # via
     #   tox
     #   virtualenv
-virtualenv==21.5.1 \
-    --hash=sha256:55aa670b67bbfb991b03fda39bd3276d92c419d702376e98c5df1c9989a26783 \
-    --hash=sha256:dca3bf98275a59c652b69d68e73433e597d977c2da9198882479d1a7188009c8
+virtualenv==21.7.13 \
+    --hash=sha256:0355558b6f33619aab31347e43643b0ebc97f61ea3acf617b2b69e1f8a843d11 \
+    --hash=sha256:1bea5af7463f59c4719db48fe739579a2a4f569c96f26c086edda85c96da9f59
     # via tox