Update pyyaml requirement from ~=6.0.2 to ~=6.0.3

Updates the requirements on [pyyaml](https://github.com/yaml/pyyaml) to permit the latest version.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/6.0.3/CHANGES)
- [Commits](https://github.com/yaml/pyyaml/compare/6.0.2...6.0.3)

---
updated-dependencies:
- dependency-name: pyyaml
  dependency-version: 6.0.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/server/requirements.txt b/server/requirements.txt
index 266191c..2ed5d3a 100644
--- a/server/requirements.txt
+++ b/server/requirements.txt
@@ -1,5 +1,5 @@
 # Items in this file must have a licence compatible with AL 2.0
-PyYAML~=6.0.2                    # MIT
+PyYAML~=6.0.3                    # MIT
 types-PyYAML                     # AL2.0
 multipart~=1.3.0                 # MIT
 elasticsearch-dsl>=7.0.0,<8.0.0  # AL2.0
diff --git a/tools/requirements.txt b/tools/requirements.txt
index f512082..6019e1f 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -1,5 +1,5 @@
 # Items in this file must have a licence compatible with AL 2.0
-PyYAML~=6.0.2                     # MIT
+PyYAML~=6.0.3                     # MIT
 # elasticsearch-dsl>=7.0.0,<8.0.0   # AL2.0 - not used by tools currently
 # N.B. ES 7.14 introduces strict server version compatibility checks
 elasticsearch[async]>=7.13.1,<7.14.0  # AL2.0