Bump lib/external from `e3f2abd` to `566e732`

[dependabot-preview[bot]]

Bumps lib/external from e3f2abd to 566e732.

Commits

• 566e732 Scale wind rotation coefficients by a factor of two (#191)
• a289c12 use git for fv3net source (#189)
• cd1e2c1 fix dns setting for mac nix-builds (#188)
• a1f556f Add diagnostics of column-integrated nudging of t, u, v (#166)
• 1fe12b7 Add vertically integrated tracer diagnostics (#184)
• 5245dff Bump .jenkins/env from f665cda to 7dc4a88 (#183)
• e42cd14 Fix coarse geopotential height diagnostic (#160)
• 943b6ac Add eddy flux diagnostics (#146)
• 45b0241 Delete conf/configure.fv3 (#178)
• 3e27aa6 nix: build fv3 with nix (#170)
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #281.