Bump excon from 1.2.8 to 1.5.0 in /src/bosh_openstack_cpi

[dependabot]

Bumps excon from 1.2.8 to 1.5.0.

Changelog

Sourced from excon's changelog.

1.5.0 2026-05-03

• update bundled certs
• invalid parameter error for nil host
• close security issues around headers and redirect following

1.4.1 2026-03-18

• change cgi require to cgi/escape for ruby 4.0+

1.4.0 2026-03-02

• fixes for ruby4
• add ruby 4.0 and drop 3.2 from ci
• add user-configurable global resolver factory
• add SOCK5 proxy support

1.3.2 2025-12-03

• update bundled certs

1.3.1 2025-11-05

• update bundled certs

1.3.0 2025-08-18

• proxy connect should always include port, regardless of default

1.2.9 2025-08-15

• bump actions/checkout
• update bundled certs

Commits

• f59b27e v1.5.0
• ea89a35 expand redirect header redaction (#901)
• 74e1754 Raise Excon::Error::InvalidParameter when host is nil instead of crashing wit...
• 4e784d5 update bundled certs
• 011b3ae v1.4.2
• aff99fc update bundled certs
• cd02b90 v1.4.1
• 9812664 Require cgi/escape instead of cgi (#898)
• 0004103 v1.4.0
• b8debfe Add SOCKS5 proxy support (#895)
• Additional commits viewable in compare view

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[neddp]

Already automatically bumped by the CI.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.