Replace 2025.2/Flamingo key with 2026.1/Gazpacho

This is a zuul-encrypted export of the signing subkey for the
OpenStack 2026.1/Gazpacho release cycle:
0xc71b007ef97887fd8fb6365ceb4fd6d618e62181

This was created using the instructions from our documentation:
https://docs.opendev.org/opendev/system-config/latest/signing.html

Depends-On: https://review.opendev.org/c/openstack/releases/+/957466
Change-Id: I3ea6b746d8c5e3b06ae316c0a37d50cf0fc8557d

zuul.d/secrets.yaml

@@ -329,36 +329,36 @@
     name: gpg_key
     data:
       private: !encrypted/pkcs1-oaep
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-          jvo0Yn92yzwYGgSBaoRjhj4vLDmJxjTbn8Af0i4e55AfHODF+aOTJ4lgcinsfj10p9Nj0
-          IZppLFlIWVUs+6X/eumsoPHifnd8UJGjdwki4tC4xNZN1cpF1SloC04w0aUxjsEZqzeG4
-          dD9a4M3Ikippckuxb+L/wktUUVyQIZsMNSWYrGELMS9egga+PcBJh59qCrAoEsV7QAxt+
-          Io2KjvWzQ5aSqJKm4aFWLDa+VGKpstLZbxX42T8v99ztP+iAnswljPwFtMUy/sZMQhaOj
-          YefLqjDeD1+HH/9E5XE5WN11fXNNQsCLK50u+N0Vh7ax6GCKiNNIsj0uLzdeyVaZFw/2y
-          lk5DSeKpGQvLsb+JB9Uz9lyToeWAX4FmYV9rEBUPpA2/6U5+k/TxUPQBV64CW9/BXx8IP
-          dtl8wNYRnw/HH4iBrzPHisTIuZMP0pKGc5kTYS3BWU0JS+JOUi2+i6j9EKF5UJJSB0jnZ
-          /hElEdvd7DYbWkkW3APKDfKxEhW9AY7+4Imx2WUtTWTQgxP/r+fb0tWU+y/RWQ=
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-          SxEU1kmN3i5kP6d1OfZ2E8XgdpwXBALCZFR7J3P8kOhDilBRma66dU98A55R47Pwn8b0g
-          zjYJs4Gqw+CjMWRfqf9Vp5awZ7qpHdKxL+yC4Ht8RfTr1rSvRJDk4V0+mwD+MEkuvOqLI
-          uexSGV79XB1XYqZjKhKd8qgVYyhlgV3XWyJ9re3DVVyi4RWX212XDbDhMnvw98ev7jZZG
-          2dNYWrp0vuI76HAg6Jgufu8URWe1c6oDTaprbosPZO5wCBrUw7jzCfgKJAQFX41UxD3EK
-          ymBrQDBXe5omR4pQjQyrsohNu8Xrnp6nO/cxsigNX8+u5ZkPv6Kcu6g8xjCic8lAXWEx0
-          wR3k4ucDpct4NNZXfCX26Efx0qJX4lZBVX58LqEO5Sj6YyTyuHaOKXU0CFV9qzgXPEkqt
-          RdqO7zESQrBPK2yPQgIRY7TUXBn64eJbbkBg6QLbN/MCUQvTNBpRi/IhmGKk16EGjFUgn
-          k8lx5ILBDU4ZoMSoAZCFyTDeC05iQWj9mzw+jSov7VobJPjCOK44kbvDPRqlyXo8y2whg
-          w2u/1KBH4InHHyOUsZ+WiwrTDowJifSISB/mgBetq3gV4zgDngqsze23ybu4cE=
+        - GgT3mBD5ZE73azzAD0JzNS8bO4b85re+EWdoU/KQwPGb+cQLKjFRm5OWRVb/WIOsIulMJ
+          c3NTx4vNXww/8SVweTazPAlAMSyxtZjEVCwhOFJadW6AJ++v3KBgmFjG8nbMx9cCk2Qrj
+          tmtDCnzQrXXTmPSzAX12EOAX8fzE7v35YnTedyJIr6ehadnv7kH/XQwQvbKF3LONOeha/
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+          46Iw3VD0NxZPa2UK+h1bIUPZZ8O2aucq6W4onam69vG359Gni0IupeqTmFBVRfByaoCNP
+          HcNzwP5/d18UNMzERULd9bVHPRWUG/X22vnVgA//RWJKA8UaBJKbMkMdNilq5BYQUnIgA
+          err+0RTJcDMPdU6sFqFXrFj4hIuR1UJx2Vz7ZKosc0wUCV6ItMn0fs+DEIyvRD45HS81V
+          LtBItppcJ7D3KuOEoJk3GODc15qtdnIcRtzOt1V7UoECnw9Ic0Z8VLnj09yhDcn1ctvdn
+          MYqUBVUOMPhdKehycMmdlI4ToAwNrkRG1dmADRxY/9K7gVOiR+c5xSr/4nh8q957a8Xay
+          QJBFBLOKD756ifXLv23bNpuT5utlWz4rnR9su3IszUOgzQ33alw8gxV1HhmOKU=
+        - Dg+J0ra/wuN1Au7W6mhDwW3v/zY748See4D9gqd5aYEIOupz7E6vYDKJrVQON4uV7nZeu
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+          7VH61yuPbd8eKWAF1iqKLYVtRqy2JydRjBuxuJ2QW6Y6ds4dWkKv/k5ncoyGnXAlr0rSB
+          91E48CLGYYwmm58++/b2RhBMQSCGJF5SiyRyR6+K0LqTWDZImFczGSZ7w9/yp9+KNZcnY
+          hjezMMSau/zUkhUvLSzdiPvT8MLJh9Bd+2Jr0B0toHwFwfKj4Pfu4bVU1A8hnbqCWj3zg
+          E1uxC4s075mXojy9L7CeJzs4Y44k1yIBzEtpAhSVooVtvUA+2crKmYDW2PXR0BpXk6A6/
+          alEtKYFjlh8kZRvZcrCadccJglDtRsrOAlSQL2WIbZnqCPrgab+mPyOgrz1o17xPoBDDn
+          PMRS5qgHP7b6Q126y9GS0DfwNDybZRTFZD6Ab+/ZyJKIQh6hF2mjyPKlhD2hLQwQ2+GOz
+          lhs4DmjvURh7w9PZuRPqdwhxdUEZnSQRF2N/N/oXhgrPhtvtcGCPLeGCDZE+WM=
+        - ondWg2i3CX8ptBThnUqBP3ApiZxgWKZkrk9+EXzbogDKyW3fEhgVNmqMmMV9gt/ohuSZW
+          v7ukdslAiigGkBlPOegKpxAGZTrcNyweatOzXW2LwKzrnRMuZsWnbSNBbw4Cs5BQrIDvg
+          FWh2RwG+Xh/P2kXlH3k1EBAzNuK4TV0hS259hKXZeoHsP+27BCRkhnhyUj/W0haId0yPE
+          VQSF24LhmVHFHOqTyZ3bNEUJ0ir2uIeLRlwYpF3b52yalE04Xid5n1x8wgwk/Dstc4FEQ
+          id0VTXzu8ZiT6RpS3u6A5C/4Ec9fVnGsmluoxuaz9AIYJAR/aZ37HZJ7h2ce/4PX/r887
+          ZOrhRTuOf93Yd4YB5z78dTvF4q902WIkEKzdLzW+PuR7u7ARDzIM06aeSzuhwcFclxXwi
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+          YYr/nqiGvevYJge+/OcYuUTknR26pVZLgrAER88x2CO2I/JfzaD+8vIDDbZcs6iYYwN6T
+          D168QTf5bCeMTLNZYDH5cWq1Sf0inaVxr4BSgvNLDF66ErvOI/mjupxpbn9o2tGgh8SKD
+          g0gb+VV9m5OzxpO/xtmBSY1itHsjsK8AgHm0/BntoNpkQWrxeDI5tt69+9mA20=
 
 - secret:
     name: proposal_ssh_key